I did three test prints with Permaset inks on cartridge paper. Although the plate was sealed, the sealing clearly wasn't adequate, so the plate, especially the cardboard, gradually disintegrated. The foam letters were also ink-greedy, as you'd expect.
I actually don't mind the final plate, which I'll seal again for future printing. I like the way there are gaps and partial letters. I may make more partial letters with cork sheet, as I like the speckly texture it gives.
This is one you'll definitely see again!