Pen Boutique offer two very absorbent brands of blotting paper.
http://www.penboutique.com/j-herbin-10-blotting-paper-pad-refill.html
http://www.penboutique.com/p-8726-visconti-plasticized-blotting-paper.aspx
When was blotter paper first found in the United States?
Blotting paper was first manufactured in the United States by Joseph Parker & Son in 1856. (no relation to Parker Pens)