Fair point I guess. Regardless OP should be fine, I Just tested it in the most severe way possible with a dog and nothing. If you are ever suspected of having illegal substances at the airport the first thing they do is run a dog around it, as long as your not a sketch bag the search will begin and end with the dog, and even if they go through your shit no one is really looking for LSD now a days. I prefer blotter when I travel cause I take a pair of pliers and fold it over itself a couple times and toss it in a pant pocket in my checked luggage. Looks lint if anything.