Yes this is true, and everytime you wash out your equipment (in the light) one can observe colors.
Originally Posted by Photo Engineer
Ron, were they still doing this when you began?
When do you think it totally ended?
I always wondered about this, it is mentioned in both Wall and Baker I think, but (except for one ref I found later) details on how this was done in practice were vague... My hang up is I do not want to lose or fog any of my emulsion, so I could not figure out how one could differientiate between grey, blue, green, yellow and under the ortho-safelight (dark red) I use in my darklab)
Leaving the area did not seem practical to me... do you know how it was done at Kodak?
Did you sacrifice a coating on glass?
and if so, to what light source?