Maybe cloth, either a thin linen or cotton might work? Used wovens from the thrift store? maybe even cotton sheets?
I'm thinking (because I'm in the middle of an abstract, handsewn, strip woven dyeproject) that if the ink was some really good india ink, the cloth might have some interesting graphics by the time it was thoroughly used and could continue life in a pieced something or other...maybe as a patch?
I'm thinking of how absorbent my linen kitchen towels are...and how absorbent worn cotton knit t-shirts are...and cotton bed sheets.
How does the blotter paper attach to the wooden thingy?
I did see where the best blotter paper is cotton, linen or hemp.
I've noticed when I'm brushing india ink onto cotton or linen cloth it bleeds around the edges unless I size the cloth with soy milk first.
I think though, unless the ink has a drying additive, it won't dry instantly on any sort of blotter?
"We're all just walking each other home." -Ram Dass
"Be a lamp, or a lifeboat, or a ladder."-Rumi
"Before blotters were invented, the preferred (albeit expensive) method was sprinkling salt over fresh written text to speed the drying process."
"Hand blotters came into fashion during the early 1800s, and generally featured a small handle mounted on a curved base, whose bottom surface was covered in felt and gently rocked over written text to absorb wet ink."
"Blotting paper was first manufactured in the United States by Joseph Parker & Son in 1856. Parker (no relation to Parker Pens) became the industry leader after recognizing the absorbent quality of softer paper sheets made without adding a binding element, or “sizing,” to the paper mixture. The result was a thicker card material that absorbed ink without damaging a pen’s nib or smudged written words."