Quote:
Originally Posted by sb1
The red which is the most unstable of all colors, can also bleed just a bit when the cards are stacked in a damp or humid environment and leave a very faint trace of the red Sweet cap back on the fronts of the cards as well. Hard to say whether this is what caused yours or just a wet freshly printed back.
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This is actually mostly false.
While it may be possible to chemically cause a transfer, and some ink formulations
Might transfer without any thing but pressure (Something I've never seen on a card but have seen on another item)
It's not possible with water or humidity.
For one thing the inks were oil based. That's a primary feature of how lithography works.
A few years ago I tried to force an offset transfer (The more proper name for a wet sheet transfer) I took a worn common, soaked it and the paper, and clamped it between boards in a vise for a couple days.
No transfer of any ink, although it did pick up an impression of the woodgrain.
