Welcome to the forum Julia.
I hope the answers here are helpful. I too think your fixer is the problem.
Originally Posted by Julia20
Hello, I just begun working in the darkroom and my english is very poor, so I apologize if I am a little vague.
I think I do everything the right way, but as soon as the pictures get into daylight, the turn greypinkpurple-ish. My developer and fixingfluid are brand new, same for the paper. I have tried 3% vinegar, 3% lemonacid and normal water as a stopbath.
Does someone has an idea what the reason might be? I feel very stupid, I have read a lot of books about the subject but it is not mentioned anywhere, and no one in my environment nows it.