Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-06 Thread Peter Devlin
On 05/03/2012 09:50, James E. Therrault mjrtas...@gmail.com wrote:

 Back in the ancient computer days, I had a H/P Deskwriter that only had CMY
 (single cartridge) and it was the cat's butt then.  Color work was not
 brilliant but I never had a bit of trouble with it.  Later, I upgraded to a
 newer CMYK unit and it gave me nothing but grief!  So much so that I vowed to
 never use another H/P product ever.  And I haven't.
 
 In theory, CMY should produce perfect colors including black and it does so in
 traditional subtractive photographic processes just as RGB works in the
 additive processes.  But it does not in the print process where every color
 media needs a black kicker to really make it work.
 
 JT
 
 (Who remembers many years in the photography and printing biz...)

I wonder if you've got me beat? I have 46 years in the photo/printing
biz from an apprentice at 16 through letterpress (Heidelbergs and
Glockners), Litho (Heidelbergs and Fuji) to densitometer controlled limited
edition printing for the Fine Art Trade Guild. Switched to prepress and
management with Dainippon galley cameras, drum scanners and final film
planning - then switched to study with an MA (now an MSc) in Digital Imaging
at the London Institute. I also had a Deskwriter - a 510 model with black
only and upgraded that to an A3 Epson 1200 with 6 colour printing.
The subtractive CMY model in photography is not comparable with the CMYK
print process as it uses continuous tone and specially coated materials to
give it a much wider gamut of colours - print processes use plain paper and
the tones have to be generated by dots to fool the human eye. Also the CMY
inks for printing were never really perfected due to the wide choice and
quality of papers and methods like gravure and web and the difficulty of
printing heavy wet on wet areas - drying time was a big bug to printers thus
the 100% black with maybe a ?% tint of C, M or Y or all three to produce a
'rich black'.
I've never come across a CMY inkjet printer but obviously they must
exist if you had one - they perhaps didn't last long as less colours seem to
contribute less to the final image in inkjet even with the coated paper.
Epson have some models which utilise 2 greys and black to produce better
quality monochrome - not unusual as high quality BW printing of
photographic books also used duotone and tritone. If only I could justify
buying one.

http://en.wikipedia.org/wiki/CMYK_color_model

Pete


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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-05 Thread Valter Prahlad
Il giorno 5-03-2012 9:01, Peter Devlin ha scritto:

 In colour mode all the printers I have come across use the CMYK
 colorspace to print - the K is the generated black - and all the cartridges
 are used. I have never seen or heard of one which uses CMY only to print in
 color.

Some cheaper printers have just a CMY cartridge, so the black is always
created by blending the colours together. Nasty. ;-)

I don't know if they're still produced, but my father bought such a printer
(Canon) many years ago. 

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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-05 Thread James E. Therrault

On Mar 5, 2012, at 2:06 AM, Valter Prahlad wrote:

 Il giorno 5-03-2012 9:01, Peter Devlin ha scritto:
 
 In colour mode all the printers I have come across use the CMYK
 colorspace to print - the K is the generated black - and all the cartridges
 are used. I have never seen or heard of one which uses CMY only to print in
 color.
 
 Some cheaper printers have just a CMY cartridge, so the black is always
 created by blending the colours together. Nasty. ;-)
 
 I don't know if they're still produced, but my father bought such a printer
 (Canon) many years ago. 


Back in the ancient computer days, I had a H/P Deskwriter that only had CMY 
(single cartridge) and it was the cat's butt then.  Color work was not 
brilliant but I never had a bit of trouble with it.  Later, I upgraded to a 
newer CMYK unit and it gave me nothing but grief!  So much so that I vowed to 
never use another H/P product ever.  And I haven't.

In theory, CMY should produce perfect colors including black and it does so in 
traditional subtractive photographic processes just as RGB works in the 
additive processes.  But it does not in the print process where every color 
media needs a black kicker to really make it work.

JT

(Who remembers many years in the photography and printing biz...)


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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-05 Thread Brian Fuelleman
What program are you trying to get the halftone image to  print from?
Photoshop on it's own has some capabilities in this area, and if you are going 
to do a lot of images, and or you want more control on the finished look, you 
might consider Andromeda's Screens filter/plug-in for Photoshop, it gives you a 
great deal of control on the size of the halftone dots, the pattern, the 
threshold level, and more.  The filter is great, but it's not cheap.



 From: Valter Prahlad valter.prah...@fastwebnet.it
To: g3-5-list@googlegroups.com 
Sent: Monday, March 5, 2012 12:06 AM
Subject: Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in 
BW
 
Il giorno 5-03-2012 9:01, Peter Devlin ha scritto:

 In colour mode all the printers I have come across use the CMYK
 colorspace to print - the K is the generated black - and all the cartridges
 are used. I have never seen or heard of one which uses CMY only to print in
 color.

Some cheaper printers have just a CMY cartridge, so the black is always
created by blending the colours together. Nasty. ;-)

I don't know if they're still produced, but my father bought such a printer
(Canon) many years ago. 

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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-04 Thread Jonas Lopez
FIRST let me thank all who replied both on list and off list.

I will look in to the several suggestions as soon as I can, but I did want to 
get this out:

Yes, my hp printer C-4180 All in one, does have a GREY-SCALE selection, and I 
did experiment with it long ago using a color pix and expecting it would print 
in-- what else-- Grey scales of some 256 shades, but NO, it printed in all 
black or all white the very reason I have appealed to the list for assistance.

BTW: I do NOT find any instruction in HELP to print in BW! So as I say, I gave 
it up.

To Santa, was the sample you sent me printed using ONLY THE BLACK INK CART? 

I bet it was all colors making fake black -- HOW DO YOU KNOW FOR SURE? 

You do know that if you print using all three colors you get FAKE BLACK!

In my case, the color cart is DOA, dry as a rock, maybe that should be DAR,   
BUT IT has to be in the printer to get the Black cart to work.

JML

--- On Fri, 3/2/12, Jonas Lopez jonaslo...@yahoo.com wrote:

From: Jonas Lopez jonaslo...@yahoo.com
Subject: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW
To: G3 G5 List g3-5-list@googlegroups.com
Date: Friday, March 2, 2012, 5:12 PM

From time to time I want to print in BW. Get the effect of aging in old 
photographs, or make your pictures look classic and use the black-and-white 
effect, etc. 

I run G4 10.4 or 10.5 looking for way to halftone a picture to print in BW, NOT 
INTEL.

Any ideeas I do NOT have photoshop.

A site letting me up load the pix and dl it back in halftone would work just 
fine.

Thanks.




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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-04 Thread Peter Devlin
On 04/03/2012 03:03, Jonas Lopez jonaslo...@yahoo.com wrote:

 You do know that if you print using all three colors you get FAKE BLACK!

I am not very sure what you mean there - RGB images like those viewed on
a computer have no black at all - black is not in the spectrum. It's only
when images are sent to print that a black is generated by the conversion to
CMYK. The appearance of black in RGB has the channel levels 0.0.0 whilst
white is 256.256.256 levels of RGB. Black is added because when printing
100% of CMY is not only a poor effort at black it is also a serious waste of
colour ink when a solid black will look better - thus UCR was developed.
Basically - unless you are working in CMYK there never is a genuine
black...



Pete


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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-04 Thread Dan

At 6:26 PM + 3/4/2012, Peter Devlin wrote:

  You do know that if you print using all three colors you get FAKE BLACK!

I am not very sure what you mean there - RGB images like those viewed on
a computer have no black at all - black is not in the spectrum. It's only
when images are sent to print that a black is generated by the conversion to
CMYK. The appearance of black in RGB has the channel levels 0.0.0 whilst
white is 256.256.256 levels of RGB. Black is added because when printing
100% of CMY is not only a poor effort at black it is also a serious waste of
colour ink when a solid black will look better - thus UCR was developed.
Basically - unless you are working in CMYK there never is a genuine
black...


Some printers have two modes - grayscale and color.

In color mode they use only the color cartridges, blending as needed 
to create grays and blacks.


In grayscale mode they use only the black cartridge...

Typically blended grays and blacks look muddy, aka fake black.

- Dan.
--
- Psychoceramic Emeritus; South Jersey, USA, Earth.

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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-03 Thread Peter Devlin
On 03/03/2012 03:34, Jonas Lopez jonaslo...@yahoo.com wrote:

 G'day Santa,
 Yes, iPhoto has in the EDIT mode a BW button, BUT THIS IS FAKE!
 
 Let me tell you why.
 All it does is print ALL COLORS and BLACK making a FAKE BLACK AND WHITE PIX.
 
 Not that it matters, but with the house in foreclosure, cancer, job loss,
 pregnant, and brother being deported, we can not spend a penny to buy a color
 cart, but I wanted to print using ONLY THE BLACK INK - NO COLOR FILL INS
 == This I have already done, it is ALL BLACK OR ALL WHITE, on a scale of 0 to
 9 it is a 1 or 2.
 
 Years ago we had newspapers printing using ONLY BLACK INK, which is all I have
 to work with NO COLOR AT ALL, so now you see how this is fake --- not using a
 halftone screen This could give a 7 or 8!
 
 Any other sources for a REAL screen?
 
 Regards
 JML
 ==
 
 --- On Fri, 3/2/12, Brian Christmas ozsa...@gmail.com wrote:
 
 From: Brian Christmas ozsa...@gmail.com
 Subject: Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in
 BW
 To: g3-5-list@googlegroups.com
 Date: Friday, March 2, 2012, 5:51 PM
 
 
 On 03/03/2012, at 12:12 PM, Jonas Lopez wrote:
 From time to time I want to print in BW. Get the effect of aging in old
 photographs, or make your pictures look classic and use the black-and-white
 effect, etc. 
 
 I run G4 10.4 or 10.5 looking for way to halftone a picture to print in BW,
 NOT INTEL.
 
 Any ideeas I do NOT have photoshop.
 
 A site letting me up load the pix and dl it back in halftone would work just
 fine.
 
 Thanks.
 G'day Jonas


I think you're looking for greyscale printing - newspapers did indeed
use a low res BW halftone screen - about 80 lines per inch I think and
black ink only which gave the appearance of tone to the human eye by varying
the size/distance between dots. This was analogue imaging though and digital
is very different but your image editor should have the ability to convert
an image to greyscale - 256 levels of grey calculated from the RGB channel
values - and your printer dialogue should have the option to print in
greyscale only - I have three printers and I know that at least two have
this option.

Pete


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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-03 Thread Brian Christmas

On 03/03/2012, at 2:34 PM, Jonas Lopez wrote:

G'day Santa,

Yes, iPhoto has in the EDIT mode a BW button, BUT THIS IS FAKE! 

Let me tell you why. 
All it does is print ALL COLORS and BLACK making a FAKE BLACK AND WHITE PIX.

Not that it matters, but with the house in foreclosure, cancer, job loss, 
pregnant, and brother being deported, we can not spend a penny to buy a color 
cart, but I wanted to print using ONLY THE BLACK INK - NO COLOR FILL INS == 
This I have already done, it is ALL BLACK OR ALL WHITE, on a scale of 0 to 9 it 
is a 1 or 2.

Years ago we had newspapers printing using ONLY BLACK INK, which is all I have 
to work with NO COLOR AT ALL, so now you see how this is fake --- not using a 
halftone screen This could give a 7 or 8!

Any other sources for a REAL screen?

Regards

JML

G'day Jonas 

I think GraphicConverter will do what you want. I'll send some off list screen 
shots of settings. (It's free as in Shareware)

Regards

Santa

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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-02 Thread Eric Hall
You can run GIMP on PPC.

A quick search and you will be in business.

Eric



 From: Jonas Lopez jonaslo...@yahoo.com
To: G3 G5 List g3-5-list@googlegroups.com 
Sent: Friday, March 2, 2012 7:12 PM
Subject: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW
 

From time to time I want to print in BW. Get the effect of aging in old 
photographs, or make your pictures look classic and use the black-and-white 
effect, etc. 

I run G4 10.4 or 10.5 looking for way to halftone a picture to print in BW, NOT 
INTEL.

Any ideeas I do NOT have photoshop.

A site letting me up load the pix and dl it back in halftone would work just 
fine.

Thanks.
 
-- 
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those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs.
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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-02 Thread Brian Christmas

On 03/03/2012, at 12:12 PM, Jonas Lopez wrote:

From time to time I want to print in BW. Get the effect of aging in old 
photographs, or make your pictures look classic and use the black-and-white 
effect, etc. 

I run G4 10.4 or 10.5 looking for way to halftone a picture to print in BW, NOT 
INTEL.

Any ideeas I do NOT have photoshop.

A site letting me up load the pix and dl it back in halftone would work just 
fine.

Thanks.
G'day Jonas

iPhoto has, and has for some time now, an edit menu, one aspect of which allows 
you to change pictures to BW or Sepia.

I don't know what version you can run under 10.4 or 10.5.

Regards

Santa

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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-02 Thread Jonas Lopez
G'day Santa,
Yes, iPhoto has in the EDIT mode a BW button, BUT THIS IS FAKE! 

Let me tell you why. 
All it does is print ALL COLORS and BLACK making a FAKE BLACK AND WHITE PIX.

Not that it matters, but with the house in foreclosure, cancer, job loss, 
pregnant, and brother being deported, we can not spend a penny to buy a color 
cart, but I wanted to print using ONLY THE BLACK INK - NO COLOR FILL INS == 
This I have already done, it is ALL BLACK OR ALL WHITE, on a scale of 0 to 9 it 
is a 1 or 2.

Years ago we had newspapers printing using ONLY BLACK INK, which is all I have 
to work with NO COLOR AT ALL, so now you see how this is fake --- not using a 
halftone screen This could give a 7 or 8!

Any other sources for a REAL screen?

Regards
JML
==

--- On Fri, 3/2/12, Brian Christmas ozsa...@gmail.com wrote:

From: Brian Christmas ozsa...@gmail.com
Subject: Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in 
BW
To: g3-5-list@googlegroups.com
Date: Friday, March 2, 2012, 5:51 PM


On 03/03/2012, at 12:12 PM, Jonas Lopez wrote:
From time to time I want to print in BW. Get the effect of aging in old 
photographs, or make your pictures look classic and use the black-and-white 
effect, etc. 

I run G4 10.4 or 10.5 looking for way to halftone a picture to print in BW, NOT 
INTEL.

Any ideeas I do NOT have photoshop.

A site letting me up load the pix and dl it back in halftone would work just 
fine.

Thanks.
G'day Jonas
iPhoto has, and has for some time now, an edit menu, one aspect of which allows 
you to change pictures to BW or Sepia.
I don't know what version you can run under 10.4 or 10.5.
Regards
Santa

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Re: G4 10.4 or 10.5 looking for way to halftone a picture to print in BW

2012-03-02 Thread Dan

At 5:12 PM -0800 3/2/2012, Jonas Lopez wrote:
From time to time I want to print in BW. Get the effect of aging in 
old photographs, or make your pictures look classic and use the 
black-and-white effect, etc.


I run G4 10.4 or 10.5 looking for way to halftone a picture to print 
in BW, NOT INTEL.


GraphicConverter, Gimp, iPhoto, Color It!, Photo Deluxe, etc.

If you just want simple bw, then there's probably an option in the 
print dialog under the ColorSync tab for bw etc.  (depends on the 
printer's driver).


- Dan.
--
- Psychoceramic Emeritus; South Jersey, USA, Earth.

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