Note 395 — PHARMACOLOGIA. (continued 2)
Reading edition
Permanent Ink for Marking Linen. This preparation is a solution of nitrate of silver, thickened with sap green, or cochineal. The preparing liquid, or Pounce liquid, as it is technically called, with which the linen to be marked is previously wetted, is a solution of soda, boiled with gum, or some animal mucilage. It is a curious circumstance, that if potass be used for this purpose, the marking ink will run.