Benzimidazo Blue Pigment

Description

Benzimidazolone Blue (PB80) is a high chroma, transparent to semi-transparent organic blue with a distinctly reddish blue / blue violet hue. It belongs to the benzimidazolone dioxazine family of high performance pigments. In paint it brings very strong tinting strength, smooth films, and clean mixes that lean toward vivid violets rather than greenish blues. Compared to Phthalo Blue (PB15), PB80 is less green and more violet; compared to Indanthrone (PB60), it's higher chroma and lighter in masstone, making luminous violets and periwinkles in tints. In watercolor it is highly staining and excels in layered glazes; in oils and acrylics it yields saturated, modern violets and deep navy blues.

History

Commercialized in the late 20th century as a durable, metal free alternative for demanding coatings, PB80 appears under trade names such as Hostaperm Blue R5R and similar benzimidazolone dioxazine blues. It was used in automotive and industrial finishes for its excellent light and weathering fastness, and is a discontinued, extinct pigment.

Pigment Information

Pigment Type: Synthetic organic (benzimidazolone dioxazine)
Suitable Mediums: Watercolor, Oil, Tempera, Acrylic
Lightfastness: Excellent
Opacity: Transparent to semi-transparent
Other Names: Benzimidazolone Blue; Hostaperm Blue R5R
Color Index Code: PB80
Image: 'A Wheatfield with Cypresses' by Van Gogh from the National Gallery

Health and Safety

• For art use only. Not for cosmetic, food or children's use.
• Keep out of reach of children and pets. Do not eat, drink or smoke while working.
• Avoid creating or breathing dust. Work in a ventilated area and wear a NIOSH approved dust respirator (P100 or better) when handling dry pigment.
• Wear gloves and eye protection. Wash hands and work surfaces after use, and never rinse pigment into drains.
• Do not spray apply, sand or burn.
• If swallowed or if you feel unwell, contact a poison control center (U.S. 1-800-222-1222) or a doctor.
• Safety Data Sheet available on request.

Caution: May cause an allergic skin reaction. Avoid breathing dust and repeated skin contact.