Im extremely new to darkroom enlarging, so thanks in advance for your patience. Basically I've been making 8x10 prints from 35mm negs, and while I'm getting good results, I've noticed that the blacks I get on the larger negatives aren't as black as when I print at a smaller size, for example 6x4. I assume this is due to the fact that there's the same amount of light being dispersed over a greater surface area. However, the longer exposure times I use for the 8x10 prints look properly exposed, except the blacks aren;t quite as punchy. I hope that makes sense. Basically I'm wondering if there's anything I can do to fix it. Cheers!