Well to my horror I have found out my paper is fogged. Very slightly which I did not notice. Only after bleaching a black scratch away on the white border did I see it. Very slight like I wrote but damn it of course toned with.
I brought myself some sodium sulfit anyway, should I mix it with Distilled water if I make a ca. 2% solution.
How do I know if it is no good anymore? What happens to it when it goes bad?