Digital BW, The Print

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.