Instead of using benzatriazole or potassium bromide as a restrainer for age-fogged paper, I sometimes use sodium bicarbonate (baking soda). I use, for a working solution of Dektol, about 10 to 20 grams per liter.

Has anyone else 'discovered' this or am I amiss in comparing this with the 'real' restrainer (i.e., benzotriazole or potassium bromide)? I do find that it works quite well, however, and it will be interesting to see if anyone has tried this before. - David Lyga