noun
Etymology: hypo + alum
: a method of altering a developed silver photographic image to a sepia color by means of a warm solution containing essentially hypo and alum
noun
Etymology: hypo + alum
: a method of altering a developed silver photographic image to a sepia color by means of a warm solution containing essentially hypo and alum
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012