Quote Originally Posted by eric
Won't an easel color the same color as the safelight cancel out any color? I once had a "red'ish" piece of paper in the darkroom and I couldn't find it only to turn on the white light and see it. It didn't occur to me that the wavelength canceled it other out. (or am I just spacing out?)
I assume that the yellow color is specifically meant to absorb all but "safe" wavelengths. I have no doubt that yellow is better than white.

Paper thickness would be another factor. I print on Ilford MG IV these days, but I remember the old days when single weight paper was pretty thin. Some paper was even thinner, but I can't remember what they called it. Half weight?