Paper and Printing Recipes / A Handy Volume of Practical Recipes, Concerning the Every-Day Business of Stationers, Printers, Binders, and the Kindred Trades

by John Sawtelle Ford

To Prevent Colored Inks from Becoming Hard.

Red and some other colored inks are often found to become so hard in a few weeks after the can has been opened that the knife can scarcely be got into them, and they cannot be got to work at all. Oil, varnish and turpentine are of no use in such a case; the remedy is paraffine oil mixed well up with the old ink. Many prefer paraffine oil rather than boiled oil or turps for thinning down both black and colored inks.