You can get DOx doses in the multi milligrams on blotter, and I doubt that blotter is fully saturated either. If you really maximised the LSD on a hit of blotter, you could get at least several milligrams to stick in it. A miligram is 10 doses. Just think about this for a second-it's very obvious that the paper is not dipped in un-diluted LSD, if it was it would be so small as to be closer to a microdot-something around the size of the head of a (small) sewing pin. You could easily look at an active dose of LSD (20-100 micrograms) and not see it, if it was not dosed onto something.