Tonight I tried to print using an old box of Ilford paper. I gave my test strip 2 1/2 minutes exposure at f4 and only got a medium gray tone. I tried changing the contrast to a 5 and still got the same outcome. I tested the paper and found no base fog. I took a test strip and put it straight into the developer with the white room lights on. After 5 minutes, the test strip had a darker gray but no black.
I tried a different paper and got a proper print.
Paper: Ilford MGF.1K, unknown age
Is there anything I can add to the developer to recover this paper?