... Specifications: ItemSuper GradeFirst ClassChroma (Colorimetry-Platinum Cobalt)5 max.10maxDensity (20-4 )1.2701.270Glyoxal40 ± 0.5%40 ± 0.5%Glycol1.0 ... : glyoxalic acid, 2-methyl glyoxaline, imidazole, ethambutal, benzodiazine, hydroxyethyl cellulose 4) Dope industry: add the glyoxal into the dope colophony, which ...