B w photo paper dating kodak
Single weight refers to the thickness of the paper base. Velox Rapid was primarily used for making contact prints from quarter plate or smaller B W negatives. because through some strange twists of fate, I was able to get my hands on this sealed, cold stored box of Velox that has been expired for Sixty two years.
To a certain extent these effects can be slowed down through refrigeration and proper storage.
Sixty two years is certainly pushing the envelope well beyond reasonable limits.
the F3 designation means that this is a medium-high contrast paper, best used for negatives a little on the under exposed side.
The F means glossy, the 3 is the contrast designation.
I, on the other hand, am crazy enough to think this might be something I can use.