That would indicate some confusion between contact printing and proofing.
Hm, yes, and frankly -please someone correct me if I'm mistaken- I don't believe we have separate terms for those in Dutch or Flemish. Proofing is "contactafdrukken" (contact prints), and so is contact printing (I guess).
So, that's our confusion, right there!
I was interpreting this as proofing, but I'm not sure what Uncle Goose meant...
-- A sinister little midget with a bucket and a mop / Where the blood goes down the drain --