||Blotter paper is a special kind of paper. It's designed to be very absorbent. It was originally invented back when people wrote with quills and fountain pens. When you write with these kind of pens, you often get spots with too much ink in spots. You would use the blotter paper to suck up this extra ink without smearing the writing. A more modern use for blotter paper is among stamp collectors. After soaking stamps off of an envelope, they stick them between 2 sheets of blotter paper and put a heavy object on them. This helps the stamps dry flat. Blotter paper is also used in chemistry and for art purposes.|
The absorbent qualities of blotter paper make it useful for making LSD doses. Liquid LSD (which is LSD in some sort of solvent such as ethanol) is soaked up into the paper. Because of the way blotter paper absorbs, a sheet laid flat in the liquid will absorb it up relatively evenly. When the liquid evaporates off, the LSD is left behind embedded in the fibers of the paper. A typical sized hit of blotter paper (approx 1/4 inch square)can probably hold up to 2mg of LSD, though of course most street acid contains 100 micrograms or less per hit.