Re: [pinhole-discussion] Fluorescent lamp UV content
Standard cool-white warm-white tubes do not emit significant UV light - at least for exposing alternative process media. Black light(bL) and blacklight blue (BBL) tubes are commonly used to expose alternative media. It likely possible to prepare and handle most alternative process materials under standard home and office type tubes without fogging the material. But there are always exceptions. I wouldn't leave alternative process materials exposed to flourescent lights over the long term though - this would likely end up fogging the material. Gord On Tue, 16 Oct 2001, Murray wrote: As far as man-made lights go, fluorescent lamps are second only to the various discharge lamps (metal vapor, HID, etc) for UV production, and these are only exceeded by sunlight. Fluorescents produce UV in their internal arc, and the coating on the inside of the lamp absorbs the UV and creates visible light. UV-filter sleeves filter about 99% of the UV.I'm reluctant to say how much UV is in the spectrum of fluorescent lamps because I can't remember how it's specified, so ignoring units, I think it was in the few to several percent range...enough to cause long term fading of artwork and fabric, but I can't say how much for cyanotype. In general, fluorescent lamps should be considered a significant UV source. Murray ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/ - Gordon J. Holtslander Dept. of Biology hol...@duke.usask.ca112 Science Place http://duke.usask.ca/~holtsgUniversity of Saskatchewan Tel (306) 966-4433 Saskatoon, Saskatchewan Fax (306) 966-4461 Canada S7N 5E2 -
Re: [pinhole-discussion] Fluorescent lamp UV content
--- Murray upt...@uptowngallery.org wrote: As far as man-made lights go, fluorescent lamps are second only to the various discharge lamps (metal vapor, HID, etc) for UV production, and these are only exceeded by sunlight. Fluorescents produce UV in their internal arc, and the coating on the inside of the lamp absorbs the UV and creates visible light. My first light box was made with regular flourescent lights, but I found that they really didn't give me the quantity of ultraviolet that would allow for reasonable time exposures. I've recently built one with black lights and the results are considerably better - about 10 minutes or so for cyanotype. The sun works as a good starting point, but one will find more consistency and higher contrast with a flourescent bank. Cheers - george = Handmade Photographic Images http://members.home.net/hmpi/ __ Do You Yahoo!? Make a great connection at Yahoo! Personals. http://personals.yahoo.com
Re: [pinhole-discussion] salted paper
--- John Yeo jonn...@thegrid.net wrote: Could you check that url? I get a dns error, and would really like to see the book. One of the best references is James Reilly's book The Albumen Salted Paper Book. This is out of print. Fortunately it has recently been put online at http://albumen.stanford.edu/library/monographs/reilly/ It works for me. I've got a copy of the book, but it took a bit of doing. I'm glad to see that it is available to everyone. Personally, I'm still working on albumen without the success I wish I could see, but it's a long learning process (not as simple as salted paper). Cheers - george = Handmade Photographic Images http://members.home.net/hmpi/ __ Do You Yahoo!? Make a great connection at Yahoo! Personals. http://personals.yahoo.com
Re: [pinhole-discussion] salted paper
--- Gordon J. Holtslander hol...@duke.usask.ca wrote: [clip] Silver Nitrate is expensive at artcraft chemicals http://www.artcraftchemicals.com its ~ $60.00 for 100 grams. That is enough to make almost a litre of the siver nitrate solution. You would likely be able to sensitize at least 50 8x10 probably more with this. It costs no more than standard photographic paper would. [clip] I just thought that I would put in an additional nod to Artcraft, where I have been buying chemicals for some time. Their prices (and shipping) are quite reasonable, and they are willing to sell you small quantities. Cheers - george = Handmade Photographic Images http://members.home.net/hmpi/ __ Do You Yahoo!? Make a great connection at Yahoo! Personals. http://personals.yahoo.com
[pinhole-discussion] Fluorescent lamp UV content
As far as man-made lights go, fluorescent lamps are second only to the various discharge lamps (metal vapor, HID, etc) for UV production, and these are only exceeded by sunlight. Fluorescents produce UV in their internal arc, and the coating on the inside of the lamp absorbs the UV and creates visible light. UV-filter sleeves filter about 99% of the UV.I'm reluctant to say how much UV is in the spectrum of fluorescent lamps because I can't remember how it's specified, so ignoring units, I think it was in the few to several percent range...enough to cause long term fading of artwork and fabric, but I can't say how much for cyanotype. In general, fluorescent lamps should be considered a significant UV source. Murray
Re: [pinhole-discussion] salted paper
Hi The url works for me. Must be a bad reference in a DNS server you access Try: http://171.64.128.245/library/monographs/reilly/ Gord On Tue, 16 Oct 2001, John Yeo wrote: Could you check that url? I get a dns error, and would really like to see the book. One of the best references is James Reilly's book The Albumen Salted Paper Book. This is out of print. Fortunately it has recently been put online at http://albumen.stanford.edu/library/monographs/reilly/ ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/ - Gordon J. Holtslander Dept. of Biology hol...@duke.usask.ca112 Science Place http://duke.usask.ca/~holtsgUniversity of Saskatchewan Tel (306) 966-4433 Saskatoon, Saskatchewan Fax (306) 966-4461 Canada S7N 5E2 -
Re: [pinhole-discussion] Re: 126 Availability
Re: [pinhole-discussion] salted paper
In a message dated 10/16/01 1:54:41 PM, hol...@duke.usask.ca writes: The Book of Alternative Photographic Processes by Christopher James. GREAT BOOK leezy
Re: [pinhole-discussion] Re: 126 Availability
126 film is the same width as 35mm. Once labs know this they're usually OK with developing the film. - Original Message - From: Rainbow Sky rainbowsky...@hotmail.com To: pinhole-discussion@p at ??? Sent: Tuesday, October 16, 2001 2:12 PM Subject: [pinhole-discussion] Re: 126 Availability Where in the U.S. would one have 126 developed? Please forgive me if I'm showing my ignorance too boldly. I've been curious about the 126 pinhole camera design, but didn't know how well the format was supported. Thanks, Mike Rainbow Sky Opposite of People (we're a band) http://www.rainbowskytrading.com http://www.oppositeofpeople.com _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/
[pinhole-discussion] Re: 126 Availability
Where in the U.S. would one have 126 developed? Please forgive me if I'm showing my ignorance too boldly. I've been curious about the 126 pinhole camera design, but didn't know how well the format was supported. Thanks, Mike Rainbow Sky Opposite of People (we're a band) http://www.rainbowskytrading.comhttp://www.oppositeofpeople.com _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp
Re: [pinhole-discussion] salted paper
Could you check that url? I get a dns error, and would really like to see the book. One of the best references is James Reilly's book The Albumen Salted Paper Book. This is out of print. Fortunately it has recently been put online at http://albumen.stanford.edu/library/monographs/reilly/
[pinhole-discussion] salted paper
Hi: Salted paper prints would make a wonderful school project. The chemistry happens right before your eyes - its astonishing. Salted paper is a printing out process. You can see the image forming on the paper as it is being exposed. The image forms in a purplish color as it exposeses. When it develops the purple changes from purple to a mottled orange, as it drys it gradually changes from the mottled orange to a nice warm toned brown. You could turn this into a chemistry lesson and have the students figure out what is happening chemically at each stage. In the sun it prints out in a few minutes. Your students would likely consider this to be very cool . Because its UV sensitive all the prep work can be done under incandescent lighting. You could have your students make their own cameras - process their own film, make their own paper and make their own prints. One of the best references is James Reilly's book The Albumen Salted Paper Book. This is out of print. Fortunately it has recently been put online at http://albumen.stanford.edu/library/monographs/reilly/ This is very comprehensive and may provide more information than students want to deal with. You may want to try one of the general alternative process books. I have heard very good reviews of the recently published The Book of Alternative Photographic Processes by Christopher James. though I haven't seen it myself Its at photoeye: http://www.photoeye.com/templates/ShowDetails.cfm?RecordID=11771 Failing this there is always the classic Keepers of the Light - its long out of print but should be in a library near you. Silver Nitrate is expensive at artcraft chemicals http://www.artcraftchemicals.com its ~ $60.00 for 100 grams. That is enough to make almost a litre of the siver nitrate solution. You would likely be able to sensitize at least 50 8x10 probably more with this. It costs no more than standard photographic paper would. You could also buy a kit from photographers formulary, bostick sullivan, etc etc... Hmm you could even use ortho film from freestyle ( http://www.freestylecamera.com ) and Dave Soemarko's LC-1 developer.( http://members.aol.com/fotodave/Articles/LC-1.html ) You mix LC-1 in two parts so one can alter the pH of the developer. Changing the pH changes the contrast of the negative. Another project Gord On Mon, 15 Oct 2001, Chuck Flagg wrote: Much the same can be done for many of the alternative processes. Salt prints are the next easiet. They are a gorgeous warm brown tone. Developed in water - they must be fixed in a dilte fixer and washed. Gord Can you suggest some good information or sources fornext easiet Salt Prints? I'm looking for a new project for my high school photo classes. They sound very interesting. Chuck Flagg ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/ - Gordon J. Holtslander Dept. of Biology hol...@duke.usask.ca112 Science Place http://duke.usask.ca/~holtsgUniversity of Saskatchewan Tel (306) 966-4433 Saskatoon, Saskatchewan Fax (306) 966-4461 Canada S7N 5E2 -
[pinhole-discussion] Re: 126 Availability
Earlier I wrote: 126 format film is available again. It is manufactured by Ferrania and sold under the Solaris film brand. It is C41 film, ISO 200, 24 exposure. When I enquired about its availability in the United States, Ferrania told me that it is available soley through their distributer, Continent-Wide, in Toronto. Apparently this film has been available in Europe. I don't European contact information. Tom
[pinhole-discussion] 126 Availability
Dear All, 126 format film is available again. It is manufactured by Ferrania and sold under the Solaris film brand. It is C41 film, ISO 200, 24 exposure. When I enquired about its availability in the United States, Ferrania told me that it is available soley through their distributer, Continent-Wide, in Toronto. I called and ordered several rolls; they were honest and told me that it is currently back-ordered; but I should get it within 2 - 3 weeks. I'll let you know how the experiment goes when the film does arrive. Current price $3.99 plus shipping (silly me: I don't know if this is Canadian or U.S. dollars). Contact info for Continent-Wide: 1-800-667-0293 voice; try x110 1-800-667-4278 fax g...@continent-wide.com Their web site is primitive and does not list the 126 film. Tom
RE: [pinhole-discussion] Daylight Printer for BW Paper
--- Chuck Flagg cfla...@home.com wrote: Much the same can be done for many of the alternative processes. Salt prints are the next easiet. They are a gorgeous warm brown tone. Developed in water - they must be fixed in a dilte fixer and washed. Gord Can you suggest some good information or sources fornext easiet Salt Prints? I'm looking for a new project for my high school photo classes. They sound very interesting. Chuck Flagg You can get a few ideas at http://members.home.net/hmpi/AltProcess/Articles/AltArticles.htm, where a number of possibilities are offered. Cheers - george = Handmade Photographic Images http://members.home.net/hmpi/ __ Do You Yahoo!? Make a great connection at Yahoo! Personals. http://personals.yahoo.com
Re: [pinhole-discussion] Daylight Printer for BW Paper
In a message dated 10/15/01 11:28:06 PM, cfla...@home.com writes: Can you suggest some good information or sources fornext easiet Salt Prints? I'm looking for a new project for my high school photo classes. They sound very interesting. Chuck Flagg For Salt prints you require silver nitrate. Expensive! leezy
