Wearing quality of experimental currency-type papers
F.T. Carson, M.B. Shaw · Journal of research of the National Bureau of Standards · 1946
Fourteen groups of high-gra de papers, differing in fiber composition, were made in the Bureau's experimental paper mill. Papers within the groups differed in the beating treatment of the pulp, in the surface-sizing treatment, and in the use or omission of melamine resin. Of the several kinds of fibers studied, caroa mixed with cotton appears to approach most nearly the desirable characteristics associated with linen-content currency paper. The high-quality wood fibers available do not appear suitable for use in currency paper. Melamine resin in currencytype paper improves folding endurance, tensile and bursting strength, strength after crumpling, stretch, resistance to abrasion, and closure of the sheet. It greatly increases the strength of the paper when wet. However, it makes the dry paper somewhat easier to tear.