Pigment red 170 F3RK P.R.170 is used in high grade industrial paints. The pigment lends color to finishes for tools, to implements, agricultural machinery, and commercial vehicles; the opaque varieties are also used for automotive finishes, such as automotive refinishes. The very opaque modification is much more stable to a variety of Commercially Available Naphthol AS Pigments 303 agents than the more transparent type. Opaque types have been introduced to the market which are characterized by noticeably improved weatherfastness compared to previously available grades. P.R.170 is less costly than similarly colored perylene tetracarbonic acid pigments or diketopyrrolopyrrole pigments P.R.170 is also very heat stable; it retains its color strength for 10 minutes at 200°C or for 30 minutes at 180°C, which makes it a valuable pigment for metal deco printing. P.R.170 is also found in decorative printing inks for polyester films. P.R.170 is broad in scope. It is found in wood stains, including solvent-based stains; it is blended with carbon black and yellows to produce a variety of interesting shades of brown. The colorations are fast to overcoating in these media and resist nitro and acid hardening varnishes and polyester coatings. Its lightfastness in these media equals step 7 on the Blue Scale.