Hi,
My last evolution of the 3 color carbon is the 3 color carbon transfert directly by the simple transfert on the final art support paper. I don't use the double transfert after printing 3 color carbon on one provisary support.
I print successivement the 3 colour directly as the simple transfert on the watercolour paper exctly as the carbon simple transfert
best
Philippe
I’m quite impressed that you manage to align the 3 prints directly on watercolour paper.
I prefer the stable plastic sheet for alignment. It allows me to attach some Ternes Burton stripping taps with some scotch and it doesn’t change its size when wet!
Bob, I've found that Shrinking the paper (Arches Platine, Stonehenge) in twice in boiling water (let paper dry after each treatment), takes care of any further shrinkage.