Kees...I appreciate your detailed response regarding how you make your tissues. For those of us in the US, I believe the 200 gsm weight of Yupo is equivalent to the 74 lb. Yupo.
I think there was a misunderstanding at the root of my question, however.
You said you do double-transfer for your color work. I was asking about the temporary support...the material you transfer each color layer to before you transfer the whole assembly to the final print paper.
Sorry about the confusion...