nontan

Etymology
en

Noun

 * 1) * 1925, I & EC (volume 17, part 1, page 43)
 * under certain conditions a nontan may accelerate tanning. The chemical nature of the nontan, the amount present, the amount of tannin present, and the pH of the solution are four factors that may markedly influence the reaction.
 * 1) * 1964, United States. Agricultural Research Service. Eastern Regional Research Center, Publications and Patents (paeg 20)
 * At higher temperature, a higher tan/nontan ratio and tannins of higher gelatine number were obtained.
 * At higher temperature, a higher tan/nontan ratio and tannins of higher gelatine number were obtained.