4450 SuperFast Blue Toner BT C.I.NO.PB1

4450 SuperFast Blue Toner BT
C.I.NO.PB1 Pigment Blue 1

P.B.1 affords clean reddish shades of blue. The PM and SM varieties are tinctorially stronger, but offer less clean shades than PT and PTM types. The higher the PT content in the pigment, the cleaner the shade, an advantage which is somewhat compromised by the fact that the tinctorial strength decreases in the same order. P.B.1 is largely as fast as other types of pigments within the same class. The products, for instance, are very unstable to polar solvents such as alcohols, ketones, and esters. P.B.1 is comparatively lightfast. 1/3 SD letterpress proof prints equal approximately step 4 on the Blue Scale, although the pigment darkens distinctly.

Its coloristic properties make P.B.1 a suitable and widely used colorant for special printing inks. The pigment may be incorporated without problems in oily binders, i.e., in letterpress and offset inks. It is equally often used in publication gravure printing inks based on toluene and in packaging printing inks based on NC. Problems which may arise as P.B.1 is incorporated in these vehicles are mentioned under P.V.2. Besides, P.B.1 lends color to paper, wallpaper, typewriter ribbons, and other media, although it is often difficult to disperse.