Pigment Red 53:1 For printing inks , HP RED 24204 for Water based inks P.R.53:1, a barium lake, is one of the most important red pigments for use in printing inks. Its scarlet shade is much yellower than that of P.R.57:1, which is the DIN 16 539 standard magenta for three and four color printing. P.R.53:1 is a comparatively strong and brilliant pigment within its range of shades. In print, P.R.53:1 shows good fastness to a series of organic solvents: it is almost completely stable to the DIN 16 524 solvent mixture. The pigment is entirely fast to clear lacquer coatings. As a result of the chemical constitution of the pigment,the prints are sensitive to alkali and acids. P.R.53:1, which is used in large volume in aqueous flexographic printing inks,may present problems in terms of storage stability.

Pigment Red 53:1 For plastics P.R.53:1 is used for its excellent heat stability as a colorant for plastics. 1/3 SD samples in HDPE withstand exposure to about 260°C for 5 minutes. Under common processing conditions, up to 260°C, P.R.53:1 has practically no effect on the shrinkage of injection-molded polyolefins. Its lightfastness in PE is approximately between step 3 and step 1 on the Blue Scale, depending on the depth of shade and on the pigment concentration. P.R.53:1 is also very strong in PVC. It is not very lightfast, but a number of disposable articles are colored to advantage with P.R.53:1. However, it has a poor fastness to bleeding.