Perforated blotter paper is carried by both laboratory supply stores and paper suppliers. It is not found in general office supply stores, and must be purchased from a speciality retailer or directly from the manufacturer or distributor.
Blotter paper is available in a wide variety of roll sizes, paper thicknesses and types of perforation. In addition to its association with illicit drugs, blotter paper has many legitimate uses in medicine and industry. Its best known industrial use is for thin-layer chromatography, but it is also used by consumers to test water pH in pools and spas. It can also be used to blot excess ink while writing with a fountain pen, but this use is no longer common due to the market dominance of ballpoint pens.