Digital BW, The Print

I hope this is appropriate for this forum. Anyone interested in printing art should have a 
look at http://webexhibits.org/colorart/index.html. It a web site being developed around 
the theme  of color vision science and art. The content I believe is largely taken from 
Margaret Livingstones work, a Harvard neurobiologist who studies the science of vision 
and a couple years ago published "Vision and Art: The Biology of Seeing" . Adbolutely 
fascinating and beautiful [science] work in my opinion. Definately pertinent to B&W 
printing. Have a look and let us know what you  think!

cheers, Dave

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "davelongviews" 
<dave@l...> wrote:
> I hope this is appropriate for this forum. Anyone interested in 
printing art should have a 
> look at http://webexhibits.org/colorart/index.html. It a web site 
being developed around 
> the theme  of color vision science and art. The content I believe 
is largely taken from 
> Margaret Livingstones work, a Harvard neurobiologist who studies 
the science of vision 
> and a couple years ago published "Vision and Art: The Biology of 
Seeing" . Adbolutely 
> fascinating and beautiful [science] work in my opinion. Definately 
pertinent to B&W 
> printing. Have a look and let us know what you  think!
> 
> cheers, Dave

I stumbled across this a few days ago while searching for something, 
didn't pay too much attention at that time, but I guess I could give 
it another look.

There are parts of the color theory and descriptions of the operation 
of the retina that do not hold in modern science. EX. "Recall that 
blue light+ yellow light = white light." This is absolutely wrong. 
Try it and find out, go to any stage, and put a yellow gel on a 
light, and a blue gel on another. Then aim the lights so that they 
mix, you will not get white. They may want to do some more research 
on color theory by going through the tutorials at 
http://www.measureitrite.com/ . They are free. They should go through 
atleast the color theory module, and really they need to pick up a 
couple of modern books on color theory and how it works with the eye 
and on prints (additive and subtractive).

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dfaprinting" 
<dfaprinting@y...> wrote:
> There are parts of the color theory and descriptions of the operation 
> of the retina that do not hold in modern science. EX. "Recall that 
> blue light+ yellow light = white light." This is absolutely wrong. 
> Try it and find out, go to any stage, and put a yellow gel on a 
> light, and a blue gel on another. Then aim the lights so that they 
> mix, you will not get white. They may want to do some more research 
> on color theory by going through the tutorials at 
> http://www.measureitrite.com/ . They are free. They should go through 
> atleast the color theory module, and really they need to pick up a 
> couple of modern books on color theory and how it works with the eye 
> and on prints (additive and subtractive).

Actually, I need to correct this. In the context of the previous 
sententces, this would not work.There are of course conditions that 
will make that statement correct. It needs a qualifier with it.

Actually my wife has a great picture (she is a commercial/studio photographer) of a white 
coffe cup lit from the left with a 10 cc blue gel, and the right with a 10 cc yellow gel. The 
shadow on the right is yellow, and the left blue, but where the two lights overlap on the 
cup it is abolutely white. Rahter than assume hey don't know their color theory, have a 
look at the interavitve parts of the site and you will see somethig very worth it in my 
opinion.

> > There are parts of the color theory and descriptions of the operation 
> > of the retina that do not hold in modern science. EX. "Recall that 
> > blue light+ yellow light = white light." This is absolutely wrong. 
> > Try it and find out, go to any stage, and put a yellow gel on a 
> > light, and a blue gel on another. Then aim the lights so that they 
> > mix, you will not get white. They may want to do some more research 
> > on color theory by going through the tutorials at 
> > http://www.measureitrite.com/ . They are free. They should go through 
> > atleast the color theory module, and really they need to pick up a 
> > couple of modern books on color theory and how it works with the eye 
> > and on prints (additive and subtractive).
> 
> Actually, I need to correct this. In the context of the previous 
> sententces, this would not work.There are of course conditions that 
> will make that statement correct. It needs a qualifier with it.

This isn't a color Group, of course...but I'm glad to see SOMEBODY
still has some visual knowledge of color, doesn't have to rely on the
crutches of measuring devices! Visual skills in color and zone theory
seem to be drifting into "lost art" category.

IMO a person who can't describe a color shift in terms of CCs
(standard color compensation units) is flying blind. I'm probably
flying blind myself, in my zone system sloppiness. 

Djon  


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "davelongviews"
<dave@l...> wrote:
> Actually my wife has a great picture (she is a commercial/studio
photographer) of a white 
> coffe cup lit from the left with a 10 cc blue gel, and the right
with a 10 cc yellow gel. The 
> shadow on the right is yellow, and the left blue, but where the two
lights overlap on the 
> cup it is abolutely white. Rahter than assume hey don't know their
color theory, have a 
> look at the interavitve parts of the site and you will see somethig
very worth it in my 
> opinion.
> 
> 
> > > There are parts of the color theory and descriptions of the
operation 
> > > of the retina that do not hold in modern science. EX. "Recall that 
> > > blue light+ yellow light = white light." This is absolutely wrong. 
> > > Try it and find out, go to any stage, and put a yellow gel on a 
> > > light, and a blue gel on another. Then aim the lights so that they 
> > > mix, you will not get white. They may want to do some more research 
> > > on color theory by going through the tutorials at 
> > > http://www.measureitrite.com/ . They are free. They should go
through 
> > > atleast the color theory module, and really they need to pick up a 
> > > couple of modern books on color theory and how it works with the
eye 

> > > and on prints (additive and subtractive).
> > 
> > Actually, I need to correct this. In the context of the previous 
> > sententces, this would not work.There are of course conditions that 
> > will make that statement correct. It needs a qualifier with it.