Phantastica said:
i dont recall where i read this, but i read that lsd is not absorbed via the skin. Hoffman is said to have tripped for the 1st time from touching L accidentally, but i read that this is not possible, and thus Hoffman must've touched his acid fingers to his mouth. so i think ppl doing Thumbrints lick their thumbs...but i have no direct experience with this, so can someone tell me if L is active intradermally or not?
Here's an erowid Q&A on it.
Ask Erowid Question and Answer: Can LSD be absorbed through the skin?
www.erowid.org
However if you are working in a lab around solvents such as DMSO like Hoffman anything is possible....
And let's be real a thumb print would be a HUGE dose. This can't be compared to touching a tab. There would certainly be enough to cross the skin into the blood stream. most of the stories I've heard were not all blissful and rosey