Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09
In thermal typing effective balance between correction lift-off and resistance to abrasion of the printed character is obtained by incorporating a solid lubricant in the ink. Variations in the machine and the environment, as well as in the materials used to make the ribbon, can upset this balance. An increase in abrasion resistance as well as an improvement in correction lift-off can provide a wider safety margin between these two apparently contradictory requirements. Glyceryl monostearate (KEMESTER 6000*) can be dispersed in solid form into the thermal ink by mechanical means (ball milling) and without dispersing or emulsifying aids. Specifically the ink is a water- borne formula, as described in U.S. Patent 4,384,797. On drying, particles of glyceryl monostearate are dispersed in solid form throughout the solid ink.