I've gotten hold of a box of Velox 2.5" x 3" contact paper from the 1950s. I'm planning to build a pinhole to suit and use some of them for paper negatives, and likely do some creative-cropping under the enlarger with the rest. Just for a test, I stuck a sheet under a middle-of-the-road 6x6 negative on the Omega B600 at maximum height and f/11. Exposed for 10 seconds, got absolutely nothing. After a few minutes in the dev, rinsed the sheet and left it sitting out under the room light. After a few minutes I did start to get purple blotches showing up, so it's not completely dead. After a bit more reading, I see that while Velox was "fast" for a contact print film it's still far slower than modern enlarging papers. So, I'm assuming my 10s at f11 and quite a high enlargement ratio wasn't nearly enough exposure. Some of what I'm reading suggests I may need to try something on the order of a couple of minutes. I'll try again to get a bit more feel for that end of things. The major question I have, though, is about developer. Kodak recommended Dektol. I was trying the Ilford Multigrade paper dev, allegedly an equivalent to Polymax. Will this work at all? I'm not familiar enough with the chemistry to know if this developer is appropriate for a non-bromide paper. ETA: I misread the info I was looking at. Velox *develops* quickly, but was quite slow even for a contact paper--to the point that it was apparently safe to work with under dim room light. Huh. Learn something new every day.