I have this 50 sheet box of 16x20 Ilford MG FB paper that's over years old. It has a light gray fog and it's hard to get a clean white. I'm thinking of using it for Lith printing or other processes that doesn't require a pure white. Is there a way of using a restrainer in the developer to avoid the fogged base? On the other hand, I can buy another box of 16x20 box of paper.