DYES AND EYE FATIGUE.
The shortage of dyestuffs since the war has led to newsprint and some other papers being made of “natural” darker shade of color, and the Madison laboratory has been investigating the question of whether this darker color produces any additional eye strain or eye fatigue. The investigations show that it does not. This is in line with the generally-held opinion previously that eye fatigue would be even less where paper was not brilliantly white, on account of the lessened contrast between the ink and paper.