“…Iodine adsorption (5, 8,14,18, SO) has been reported most frequently, followed by that of organic accelerators (8, 14, 18, SO), such as diphenylguanidine, mercaptobenzothiazole, and hexamethylenetetramine, and by potassium hydroxide (32). The adsorption of dyes (14, SO) (such as methylene blue, malachite green, and victoria blue), of sulfur (8,18), and of benzoic acid (8) have also been described. Carson and Sebrell (8) have described the reaction, or interaction, of adsorbed material with zinc oxide and sulfur.…”