Re: [pinhole-discussion] Bellows factor
That was my instinct, Guillermo, and thanks for your answer. Funny thing is, I tried it yesterday at a minute and a half--my rough calculation, which was close to your suggested 84.5 seconds--and it completely overexposed the film. It was all white (using Polaroid Type 55). Then I tried it indoors in a setting that I know from experience needs about 45 minutes. I gave it about an hour--very little more than what I would normally—and the expoure was more or less correct. In other words, it was behaving very much like the extension had no effect at all. Wonder why? Colin There is no rule of thumb, just plain physics of light. This case is in no way different than if you were using a glass lens. If I would expect a 2-second exposure outside in full sunlight with a 5.0CM focal length, for example, what would be a theoretical equivalent at 32.5 CM? 84.5 seconds (uncorrected for reciprocity, time) Guillermo ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/ __ Do You Yahoo!? Buy the perfect holiday gifts at Yahoo! Shopping. http://shopping.yahoo.com
Re: [pinhole-discussion] changing bags
--- Eric S. Theise mat...@cyberwerks.com wrote: tricks...@aol.com writes: I was wondering . Does anybody on this list NOT use a changing bag? Interesting. Just for the record, I have never owned a changing back and never used one in my life. Colin __ Do You Yahoo!? Buy the perfect holiday gifts at Yahoo! Shopping. http://shopping.yahoo.com
Re: [pinhole-discussion] Re: changing bags--who uses them??
Diana, So how do you change your 35mm onto reels? Do you do that at all? --jeremiah In a message dated 11/30/01 3:25:58 PM, dlhbl...@mindspring.com writes: I never use a changing bag for all the reasons (and more) already given. I just collected (bought new or used) enough film holders over the years, and now I load them all up before I go out, and that works for me. I just could not handle sheet film in a changing bag, without accumulating dust and--worse--scratches. But maybe I'm not as careful as most (?) Still, I suggest getting film holders. You can always find used ones--in good shape and reasonably priced. --Diana
Re: [pinhole-discussion] Anyone seen any interesting work lately?
Hi Eric, Congratulations on you show. Please send us more, it's very nice indeed! Joao
Re: [pinhole-discussion] Darkroom door - suggestion needed
Hi Guillermo, I once visited a studio here where all doors, studio and lab, had a kind of a pre room, you had to close the first door and stand in this small room for a while and get some air circulating to clean dust before going into the lab. Pretty fancy but also pretty expensive. My home solution is a heavy cloth curtain wider and longer than the door placed right behind it, so when I'm in with door closed, the curtain cuts all the light leaks comming in. Have fun with your project, Joao
Re: [pinhole-discussion] Anyone seen any interesting work lately?
There is an exhibit of photographs by Henry P. Bosse at the Weisman Art Museum at the University of Minnesota. Bosse was an German-born engineer, surveyor and draftsman who worked for the for the Corp of Engineers on the Upper Mississippi from the late 1870s through the early 1900s. He produced a remarkably accurate set of maps covering the area between Minneapolis and St. Louis that guided river pilots until locks and dams were built in the 1930s. He also photographed extensively along the entire upper river using an 11x14 view camera. His images are mostly impeccably composed landscpapes recording towns, bridges and the power of the river as it interacts with the newly created civilization that used the watercourse as its main highway. Many images of steamboats and work on the river are also part of his photography. Nearly all of the images are contact-printed cyanotypes, which makes sense for a working surveyor and draftsman travelling in a riverboat. Most are printed as ovals, which perhaps makes them seem quaint to us now, but must have presented a compositional challenge to Bosse. His work was unknown until a volume owned by relatives and then given to a neighbor surfaced about ten years ago. When auctioned at Sotheby's, the high quality of the work immediately placed Bosse as one of the great 19th century photographers. A second volume of his work was found in the pilot house of a river dredge, where it had been in a drawer since 1937. The Around 1972, I played a bit part on the first environment impact study of the upper river. My job was to use a planimeter to measure the surface of the river on some old navigation maps and then again on the latest ariel-photographed navigation charts. The idea what to find differences between the free-flowing river and the series of pools that it has become today. A true delight for me at the Bosse exhibition was to discover that this remarkable engineer/photographer produced the maps I worked with nearly thirty years ago. Try this link; but be warned: The slideshow takes a painfully long time to load over a dail-up line. http://webcampus3.stthomas.edu/mjodonnell/bosse/exhibit.html - Original Message - From: Kate Hudec hu...@rcn.com To: pinhole-discussion@p at ??? Sent: Friday, November 30, 2001 2:38 PM Subject: [pinhole-discussion] Anyone seen any interesting work lately? Lots of tech talk on the digest lately, which is great, but I was wondering if anyone had seen any photography - pinhole or otherwise - that got them excited lately? ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/
Re: [pinhole-discussion] Re: changing bags
on 30/11/01 3:54 pm, Guy Glorieux at guy.glori...@sympatico.ca wrote: Tom Miller wrote: Beware of dust that gets into the bag and onto sheet film and never seems to leave the bag despite using a vacuum cleaner on its insides. I have a changing bag and do whatever I can to NOT use it for loading sheet film. Same here when it comes to loading sheet film. But I use it a lot to load my reels for developing tanks. I have the same problem with stattic, but if I let a sufficient amount of air get into the bag through the arms pocket after the bag is closed, then things get a little more comfortable. Guy ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/ There are some bags that have a mesh-like inner bag that doesn't 'sweat' like plastic. Perhaps you can find one over where you are. I have used one in the fiercest of sun and if you are quick, things don't get too sticky. Alexis
Re: [pinhole-discussion] Anyone seen any interesting work lately?
Eric, ... but this'll give you some idea of what my work looks like. Cool! Please keep us informed about your work. Hope to see more in a website as my hometown is so far from yours that I can't personally attend ;-) Erich ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/
Re: [pinhole-discussion] Anyone seen any interesting work lately?
In a message dated 11/30/01 4:42:36 PM, hu...@rcn.com writes: Lots of tech talk on the digest lately, which is great, but I was wondering if anyone had seen any photography - pinhole or otherwise - that got them excited lately? Robert ParkeHarrison leezy
RE: [pinhole-discussion] Anyone seen any interesting work lately?
That is Wonderful!! I just dismantled my show at Children's Specialized Hospital so I have to go looks at others... now where was that frequent flyer certificate for continental USA...hmmm...leave at 10 ... ow well. Have a GREAT RECEPTION!! andy -Original Message- From: pinhole-discussion-admin@p at ??? [mailto:pinhole-discussion-admin@p at ???]On Behalf Of Eric S. Theise Sent: Friday, November 30, 2001 3:52 PM To: pinhole-discussion@p at ??? Subject: Re: [pinhole-discussion] Anyone seen any interesting work lately? Kate Hudec writes: seen any photography - pinhole or otherwise - that got them excited lately? This opportunity is to good to miss. May I promote a show I have up in San Francisco right now? It's at the Hayes and Vine Wine Bar, 377 Hayes Street near Gough, and it's five photogravures made from pinhole photographs, one cyanotype on Japanese paper, mounted chine colle on backing paper, a soft ground etching, and two Ed Ruscha photo-silkscreens from 1975 that, I hope, add an interesting dimension of color and technique to the proceedings. There are also some studies for a new pinhole portfolio that has not been cooperating, photogravure-wise. There is a reception tomorrow, Saturday the 1st, from 3-5 if you're in the area. The wine should be uncharacteristically good for an art reception. And the show is up until January 13th. It is exciting to see my work up, especially when the bar is full and lively. Oh, also, some of my pieces are in the current (Winter 2001) issue of Zyzzyva, a west coast literary magazine that is distributed all over the place. --Eric ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/
Re: [pinhole-discussion] Anyone seen any interesting work lately?
Erich writes: I think what Kate ment was something exciting to show around here in the list. http://cyberwerks.com/printmaking/ The slides that these web images are based on were overexposed and need to be reshot, so some detail is lost, but this'll give you some idea of what my work looks like. Exciting around here... I hope so! --Eric
Re: [pinhole-discussion] Anyone seen any interesting work lately?
Eric, That's a great opportunity. Wish I could be there, but I think what Kate ment was something exciting to show around here in the list. Something worthwhile to see and enjoy to bring a little life to that gray theory. Please correct me Kate, if I'm wrong ;-) Erich Eric S. Theise wrote: Kate Hudec writes: seen any photography - pinhole or otherwise - that got them excited lately? ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/
RE: [pinhole-discussion] Anyone seen any interesting work lately?
I'm on a digital art list, and they recently had a viewing of work to select some pieces to be displayed on a web site. If you're interested in new tech vs old tech, take a look at http://www.digitalphotoart.org/ No pinholes, but many started life as photos. Mike Keller http://www.mikekellerphoto.com With every mistake We must surely be learning Still my guitar gently weeps George Harrison 1943-2001
[pinhole-discussion] Re: changing bags--who uses them??
Message: 2 From: tricks...@aol.com Date: Fri, 30 Nov 2001 13:06:58 EST Subject: Re: [pinhole-discussion] changing bags To: pinhole-discussion@p at ??? Reply-To: pinhole-discussion@p at ??? I was wondering . Does anybody on this list NOT use a changing bag? In a message dated 11/30/01 9:47:47 AM, twmil...@mr.net writes: Beware of dust that gets into the bag and onto sheet film and never seems to leave the bag despite using a vacuum cleaner on its insides. I have a changing bag and do whatever I can to NOT use it for loading sheet film. I never use a changing bag for all the reasons (and more) already given. I just collected (bought new or used) enough film holders over the years, and now I load them all up before I go out, and that works for me. I just could not handle sheet film in a changing bag, without accumulating dust and--worse--scratches. But maybe I'm not as careful as most (?) Still, I suggest getting film holders. You can always find used ones--in good shape and reasonably priced. --Diana
Re: [pinhole-discussion] Anyone seen any interesting work lately?
Eric S. Theise writes: This opportunity is to good to miss. Groan. too good. Occurs to me that I'll also be bringing my camera and some of the photogravure plates along tomorrow to the reception for anyone who's interested. Thanks, Eric
Re: [pinhole-discussion] Anyone seen any interesting work lately?
Kate Hudec writes: seen any photography - pinhole or otherwise - that got them excited lately? This opportunity is to good to miss. May I promote a show I have up in San Francisco right now? It's at the Hayes and Vine Wine Bar, 377 Hayes Street near Gough, and it's five photogravures made from pinhole photographs, one cyanotype on Japanese paper, mounted chine colle on backing paper, a soft ground etching, and two Ed Ruscha photo-silkscreens from 1975 that, I hope, add an interesting dimension of color and technique to the proceedings. There are also some studies for a new pinhole portfolio that has not been cooperating, photogravure-wise. There is a reception tomorrow, Saturday the 1st, from 3-5 if you're in the area. The wine should be uncharacteristically good for an art reception. And the show is up until January 13th. It is exciting to see my work up, especially when the bar is full and lively. Oh, also, some of my pieces are in the current (Winter 2001) issue of Zyzzyva, a west coast literary magazine that is distributed all over the place. --Eric
Re: [pinhole-discussion] changing bags
on 30/11/01 3:33 pm, Andy Schmitt at aschm...@warwick.net wrote: Guillermo Have you tried spraying the outside of the bag with some of the spray they sell to women for reducing static cling in dresses? andy -Original Message- From: pinhole-discussion-admin@p at ??? [mailto:pinhole-discussion-admin@p at ???]On Behalf Of G.Penate Sent: Friday, November 30, 2001 10:14 AM To: pinhole-discussion@p at ??? Subject: Re: [pinhole-discussion] changing bags - Original Message - From: R Duarte ra...@rahji.com anyone have any tips or things i should know before buying a changing bag? i'll probably use it to load filmbacks, a big old 8x10 foamcore camera, 120 rolls onto reels, etc. thanks for any help... I own one, use it but hate it. Mine, generates static electricity, hence the fabric tends to stick to whatever you have inside, my hands inclusive. I load 35mm film into reels and 4x5 into holders without much problem, but working with 120 is difficult IMO. I got mine free when I bought a press camera at eBay, but if I had to buy one I'd probably get a tent instead of a bag. Guillermo ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/ ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/ I too use a changing bag and hate it must.. find.. film.. holders.. Alexis
Re: [pinhole-discussion] Re: translation GORDY EMERY
on 29/11/01 12:14 pm, Joao Ribeiro at jribe...@greco.com.br wrote: Hi Alexis, Paraffin oils have a boiling point in the range of 150 - 300 degrees Centigrade while the wax has one between 50 and 60 degrees. Paraffin wax is used for all sorts of things includeing cheap candles and waxed paper. Actually I think you mean that paraffin has a melting point of about 60 o C Camphorated oil on the other hand I would suspect is not strictly necessary. The oil part yes, but the camphor part was probably used as a preservative as some of you may remember camphor balls or mothball ususally consisting of napthalene and sometimes, yes you've guessed it, camphor. Therefore, camphorated oil was probably used as an amplication for preseving perishable non edible goods in the days of moths. Now all of this is some educated conjecture but I hope it is of use to you. I would think that oil would be sufficient. It's hard to say, in the wet plate process they used to varnish the plate with gum sandarac and in the formula they recommend oil of lavender. The oil is added for flexibility and, as I was told, it has to be lavender. I tried oiling papers with sunflower oil, it works fine but it goes rancid over time and smells pretty bad, so maybe the preservative is important. Paraffin (solid thing) works fine but the paper is fragile after, it marks easily (at least thin paper I use with ink jet printers). I have an old formula here that I have never tried, but maybe it works, who knows, it says: To make paper transparent: Dip the paper in a bath at 80 o C of: Parafin (solid) . 40 gr. Linsen oil 10 gr. After the paper take up all the solution it cans, drain it fast and put it between 2 sheets of blotting paper. Will it work? Who knows, but why does he give the amount of oil in gr and not in ml? This formula dates from 1905, found it in a paper I have here and it has other curiosities. I am just looking up in a dictionary that camphor itself is a whitish, translucent crystaline, pleasant-smelling terpene ketone, whatever that means except that most ketones smell nice from what I can remember at school, used in medicine and in the manufacture of celluloid. Ah ha! There it is, the manufacture of celluloid. Is that not what one is doing when applying the camphorated oil to the paper with paraffin? Probably not. Will sulfuric acid damage the gelatin part of the photo paper? I am working with an Arjo Wiggins Parchment paper called Linaje and they told me that the transparency is obtained by immersing the paper in a solution of sulfuric acid, washing, neutralising and buffering it after. Anyway, whoever got a good formula I'm interested in knowing. Cheers Joao P.S. I have an old formula for turning the wood black, but I don't know how to translate it, maybe Guillermo will help, it says: Extrato de Pau de Campeche .. 15 gr. (what the ... is that?) Cromato de Potassa ... 2 gr. (I believe it is Alumem de cromo ) Agua .. 1000 gr. He says to dissolve the Campeche first in hot water and add the Cromato. The solution is dark violet and becomes black in contact with the wood. Dear Joao Of course you are right; I was talking about melting points for paraffin. And thanks for your formulae; I may well use them some day if I want a special prarchment or tracing paper All the best Alexis
Re: [pinhole-discussion] Re: translation GORDY EMERY
on 29/11/01 12:14 pm, Joao Ribeiro at jribe...@greco.com.br wrote: Hi Alexis, Paraffin oils have a boiling point in the range of 150 - 300 degrees Centigrade while the wax has one between 50 and 60 degrees. Paraffin wax is used for all sorts of things includeing cheap candles and waxed paper. Actually I think you mean that paraffin has a melting point of about 60 o C Camphorated oil on the other hand I would suspect is not strictly necessary. The oil part yes, but the camphor part was probably used as a preservative as some of you may remember camphor balls or mothball ususally consisting of napthalene and sometimes, yes you've guessed it, camphor. Therefore, camphorated oil was probably used as an amplication for preseving perishable non edible goods in the days of moths. Now all of this is some educated conjecture but I hope it is of use to you. I would think that oil would be sufficient. It's hard to say, in the wet plate process they used to varnish the plate with gum sandarac and in the formula they recommend oil of lavender. The oil is added for flexibility and, as I was told, it has to be lavender. I tried oiling papers with sunflower oil, it works fine but it goes rancid over time and smells pretty bad, so maybe the preservative is important. Paraffin (solid thing) works fine but the paper is fragile after, it marks easily (at least thin paper I use with ink jet printers). I have an old formula here that I have never tried, but maybe it works, who knows, it says: To make paper transparent: Dip the paper in a bath at 80 o C of: Parafin (solid) . 40 gr. Linsen oil 10 gr. After the paper take up all the solution it cans, drain it fast and put it between 2 sheets of blotting paper. Will it work? Who knows, but why does he give the amount of oil in gr and not in ml? This formula dates from 1905, found it in a paper I have here and it has other curiosities. I am just looking up in a dictionary that camphor itself is a whitish, translucent crystaline, pleasant-smelling terpene ketone, whatever that means except that most ketones smell nice from what I can remember at school, used in medicine and in the manufacture of celluloid. Ah ha! There it is, the manufacture of celluloid. Is that not what one is doing when applying the camphorated oil to the paper with paraffin? Probably not. Will sulfuric acid damage the gelatin part of the photo paper? I am working with an Arjo Wiggins Parchment paper called Linaje and they told me that the transparency is obtained by immersing the paper in a solution of sulfuric acid, washing, neutralising and buffering it after. Anyway, whoever got a good formula I'm interested in knowing. Cheers Joao P.S. I have an old formula for turning the wood black, but I don't know how to translate it, maybe Guillermo will help, it says: Extrato de Pau de Campeche .. 15 gr. (what the ... is that?) Cromato de Potassa ... 2 gr. (I believe it is Alumem de cromo ) Agua .. 1000 gr. He says to dissolve the Campeche first in hot water and add the Cromato. The solution is dark violet and becomes black in contact with the wood. Dear Joao Of course you are right; I was talking about the melting point. Thanks for your formulae, I may use them one day when I want to make tracing papers of particular quality. All the best Alexis
Re: [pinhole-discussion] changing bags
In a message dated 11/30/01 9:47:47 AM Central Standard Time, twmil...@mr.net writes: Beware of dust that gets into the bag and onto sheet film and never seems to leave the bag despite using a vacuum cleaner on its insides. I have a changing bag and do whatever I can to NOT use it for loading sheet film. I use a changing bag, but what I do is , wad the changing bag up and put it into a baggie , the half gallon size with a zip lock. I take it out of the baggie when I need to change film holders in the changing bag , or unload a camera , etc, then it goes right back into the baggie after , and I have not had a problem (cross my fingers,eyes , etc) It might seem a bit much, but all I know it works for me,
Re: [pinhole-discussion] changing bags
tricks...@aol.com writes: I was wondering . Does anybody on this list NOT use a changing bag? My experience is the same as Tom's... DUST, despite shaking and cleaning and vacuuming. Using a changing bag on a project turned out to be the dumbest thing I did this year. Although I suppose I will need to use it again sometime in the field, I try to load my backs in a closet or darkroom in advance now, and I'd rather carry a couple more backs than subject my projects to that level of dust again. --Eric
Re: [pinhole-discussion] changing bags
I was wondering . Does anybody on this list NOT use a changing bag? In a message dated 11/30/01 9:47:47 AM, twmil...@mr.net writes: Beware of dust that gets into the bag and onto sheet film and never seems to leave the bag despite using a vacuum cleaner on its insides. I have a changing bag and do whatever I can to NOT use it for loading sheet film.
RE: [pinhole-discussion] changing bags
No, it's the result of the awful stinky plastic odor trapped inside a well-sealed changing bag.g |-Original Message- | | I'm happy enough with my changing bag, | but my hands stink everytime I use it.g | |Maybe the stink comes from the spray Andy is suggesting me to use! |which brand you use? so I avoid it. :-)) | |Guillermo | |
[pinhole-discussion] Re: changing bags
Tom Miller wrote: Beware of dust that gets into the bag and onto sheet film and never seems to leave the bag despite using a vacuum cleaner on its insides. I have a changing bag and do whatever I can to NOT use it for loading sheet film. Same here when it comes to loading sheet film. But I use it a lot to load my reels for developing tanks. I have the same problem with stattic, but if I let a sufficient amount of air get into the bag through the arms pocket after the bag is closed, then things get a little more comfortable. Guy
RE: [pinhole-discussion] Darkroom door - suggestion needed
Hey One of the easiest sealers I've found, especially for new straight doors is the rubber tube attached to a metal strip that you nail into the buck frame/molding. There is also a company that makes Black out drapes (RonLock -Rockland Industries Inc PO Box 1293 Baltimore Md. 21297). They sell off the irregulars on ebay. I've never tried a pocket door since I haven't been able to build a darkroom wall from scratch. Interesting idea since you can route out the spots where the door meets the buck frame really seal it nicely. BTW.buy a flat door...the pretty ones with mitered panels are not completely light tightor put a sheet of black plastic on the darkroom side. The other thing I've found is I leave a HEPTA filtered fan running to take up the dust...seems to work well since I never seem to find dust in there even with heat ducts, etc. good luck...please keep us informed on your choice it's results. andy -Original Message- From: pinhole-discussion-admin@p at ??? [mailto:pinhole-discussion-admin@p at ???]On Behalf Of G.Penate Sent: Friday, November 30, 2001 10:35 AM To: pinhole-discussion@p at ??? Subject: [pinhole-discussion] Darkroom door - suggestion needed After having no darkroom for the past 6 years or so, I am now building a 9 x 8 feet darkroom in my basement. Yesterday I made the framing of the walls, except the wall where the door will be situated. I am considering a pocket sliding door and adding 2 of extra moulding all around the inside door opening, as a way to make it light leaks proof. I have to buy the door (sliding or conventional door) by tomorrow and would love to hear any comments or suggestions people have on that respect. I know this question is a bit OT but since am going to use the darkroom to develop/print my pinhole stuff, I thought the pinhole list police would let this one go! Hope to hear from anyone having an opinion (direct mail is OK) Guillermo ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/
RE: [pinhole-discussion] Darkroom door - suggestion needed
Make sure you make it large enough to accomodate the largest piece of gear you'll want to bring through that door. That includes allowing for the door jamb and moulding.
RE: [pinhole-discussion] Greetings and paper negative info
... oh ok. i was trying to keep it simple... 8o) andy -Original Message- From: pinhole-discussion-admin@p at ??? [mailto:pinhole-discussion-admin@p at ???]On Behalf Of Richard M. Koolish Sent: Friday, July 10, 2893 6:44 PM To: pinhole-discussion@p at ??? Subject: Re: [pinhole-discussion] Greetings and paper negative info Mike, Do you process it with standard BW chemistry? Guy yes the only difference is the emulsion is sensitive to red green, sort of like color film. andy k Color films and papers have three emulsion layers, each sensitive to a different color. Panalure paper has a single panchromatic (all colors) black and white emulsion, similar to panchromatic black and white films like Tri-X. Single grade black and white papers have one emulsion layer sensitive to blue light and not sensitive to red light, which is why we can use a red safelight with these papers. Variable contrast papers have two emulsion layers, one low contrast and one high contrast. One layer is sensitive to blue light and one to green light. ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/
Re: [pinhole-discussion] Greetings and paper negative info
Mike, Do you process it with standard BW chemistry? Guy yes the only difference is the emulsion is sensitive to red green, sort of like color film. andy k Color films and papers have three emulsion layers, each sensitive to a different color. Panalure paper has a single panchromatic (all colors) black and white emulsion, similar to panchromatic black and white films like Tri-X. Single grade black and white papers have one emulsion layer sensitive to blue light and not sensitive to red light, which is why we can use a red safelight with these papers. Variable contrast papers have two emulsion layers, one low contrast and one high contrast. One layer is sensitive to blue light and one to green light.
RE: [pinhole-discussion] changing bags
Guillermo Have you tried spraying the outside of the bag with some of the spray they sell to women for reducing static cling in dresses? andy -Original Message- From: pinhole-discussion-admin@p at ??? [mailto:pinhole-discussion-admin@p at ???]On Behalf Of G.Penate Sent: Friday, November 30, 2001 10:14 AM To: pinhole-discussion@p at ??? Subject: Re: [pinhole-discussion] changing bags - Original Message - From: R Duarte ra...@rahji.com anyone have any tips or things i should know before buying a changing bag? i'll probably use it to load filmbacks, a big old 8x10 foamcore camera, 120 rolls onto reels, etc. thanks for any help... I own one, use it but hate it. Mine, generates static electricity, hence the fabric tends to stick to whatever you have inside, my hands inclusive. I load 35mm film into reels and 4x5 into holders without much problem, but working with 120 is difficult IMO. I got mine free when I bought a press camera at eBay, but if I had to buy one I'd probably get a tent instead of a bag. Guillermo ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/
[pinhole-discussion] Darkroom door - suggestion needed
After having no darkroom for the past 6 years or so, I am now building a 9 x 8 feet darkroom in my basement. Yesterday I made the framing of the walls, except the wall where the door will be situated. I am considering a pocket sliding door and adding 2 of extra moulding all around the inside door opening, as a way to make it light leaks proof. I have to buy the door (sliding or conventional door) by tomorrow and would love to hear any comments or suggestions people have on that respect. I know this question is a bit OT but since am going to use the darkroom to develop/print my pinhole stuff, I thought the pinhole list police would let this one go! Hope to hear from anyone having an opinion (direct mail is OK) Guillermo
Re: [pinhole-discussion] Greetings and paper negative info
- Original Message - From: Don Hill donh...@juno.com With all the talk regarding paper negatives I thought I would add a small bit of information. I have recently started using panalure for making paper negatives in camera During the past weeks I was considering in doing that, thanks for the info. Talking about paper negatives, what about this one I made for a workshop I gave recently: it is a 35mm format paper negative using satin MGIV paper and then enlarging the paper negative to 6x6 inches: http://members.rogers.com/penate/doll6x6.jpg I reported this before but forgot to add a link to the image. Guillermo
Re: [pinhole-discussion] changing bags
- Original Message - From: R Duarte ra...@rahji.com anyone have any tips or things i should know before buying a changing bag? i'll probably use it to load filmbacks, a big old 8x10 foamcore camera, 120 rolls onto reels, etc. thanks for any help... I own one, use it but hate it. Mine, generates static electricity, hence the fabric tends to stick to whatever you have inside, my hands inclusive. I load 35mm film into reels and 4x5 into holders without much problem, but working with 120 is difficult IMO. I got mine free when I bought a press camera at eBay, but if I had to buy one I'd probably get a tent instead of a bag. Guillermo
RE: [pinhole-discussion] Greetings and paper negative info
yes the only difference is the emulsion is sensitive to red green, sort of like color film. andy -Original Message- From: pinhole-discussion-admin@p at ??? [mailto:pinhole-discussion-admin@p at ???]On Behalf Of Guy Glorieux Sent: Friday, November 30, 2001 9:45 AM To: pinhole-discussion@p at ??? Subject: Re: [pinhole-discussion] Greetings and paper negative info |Guy, | Panalure is panchromatic, not ortho or blue sensitive. That's why it |requires full darkness. | |Mike | Mike, Do you process it with standard BW chemistry? Guy ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/
Re: [pinhole-discussion] Greetings and paper negative info
| Panalure is panchromatic, not ortho or blue sensitive. That's why it |requires full darkness. | |Mike | Mike, Do you process it with standard BW chemistry? Guy The Kodak info on Panalure is at: http://www.kodak.com/global/en/professional/support/techPubs/g27/g27.jhtml
Re: [pinhole-discussion] Greetings and paper negative info
|Guy, | Panalure is panchromatic, not ortho or blue sensitive. That's why it |requires full darkness. | |Mike | Mike, Do you process it with standard BW chemistry? Guy
RE: [pinhole-discussion] Greetings and paper negative info
I would presume you can use color darkroom safelights with Panalure. |-Original Message- | | |Guy, | Panalure is panchromatic, not ortho or blue sensitive. That's why it |requires full darkness. | |Mike |
Re: [pinhole-discussion] Greetings and paper negative info
Guy, Panalure is panchromatic, not ortho or blue sensitive. That's why it requires full darkness. Mike In a message dated 11/30/01 7:01:51 AM, guy.glori...@sympatico.ca writes: I have never used Panalure, but I'm surprised that you would get bad fogging during normal development under safelight, to the point that you need to develop it in full darkness. Is this the case whether you use red or yellow-green safelights?
[pinhole-discussion] A final thought about reciprocity failure with paper negs.
The more I thought about this the more I realized that, with very long exposures, the risk of overexposure is lessened by reciprocity failure, and the longer the exposure, the less the overexposure risk. In essence, it is far easier to fatally underexpose than fatally overexpose, and far more efficient to overexpose and then work backward from that than vice versa.
Re: [pinhole-discussion] Greetings and paper negative info
Thanks for this very interesting outline, Don. I have never used Panalure, but I'm surprised that you would get bad fogging during normal development under safelight, to the point that you need to develop it in full darkness. Is this the case whether you use red or yellow-green safelights? I experience fogging problems when I process prints using the Lith Printing process, because of the long processing times (8-10 minutes or above), but I've solved that by using a low wattage bulb with my safelight and using the recommended yellow-green safelight for the papers I use. On a different point, allow me to mention a process which I've used in the past that is a distant parent of yours. It goes along the following: 1. Print and process your print the ususal way. 2. Go to the nearest laser copy machine and get a negative image from the copymachine, the size of the final print you want to make. 3. Apply 3-8 coats of Liquitex Acrylic Matte Medium, letting dry between coats and applying each coat cross-wise to the previous one. Fewer coats will give you a more fragile base while many coats will give you a coarser base to work with latter. 4. Soak in warm water and slowly peel the paper from the acrylic base. The (negative) image will stick to the base. The base will look rather milky when dry. 5. Use this negative to make a contact print. If the negative is small enough (e.g. 4x5), you can put it in your favorite 4x5 enlarger and the criss-cross texture of the acrylic base will show much more on your print. If you happen to have an 8x10 enlarger in your darkroom, then all the better. The texture will look as if the print was printed on linen cloth. Cheers, Guy
[pinhole-discussion] Re: Bellows factor
G.Penate wrote: just plain physics of light. This case is in no way different than if you were using a glass lens. snip 84.5 seconds (uncorrected for reciprocity, time) Guillermo, Can you remind me how you worked this out. Guy
