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Manganese Blue Hue

 

Manganese Blue Hue

Pigment History: Manganese Blue is a synthetic green-blue pigment made by fixing barium manganate on a barium sulfate base. Manganese Blue was favored by fresco painters and artisans interested in tinting cement. However, it was found to be highly toxic and ingestion or inhalation could cause a nervous system disorder. A difficult pigment to match, the inherent transparency of true Manganese Blue can only be re-created by using Zinc White to lighten the Phthalo blend’s value, then extending it further with a large dose of gel medium. The resulting glaze-like paint yields cool soft fields of color.
Pigment Classification: Mixture
Chemical Description:Copper Phthalocyanine / Zinc Oxide / Chlorinated Copper Phthalocyanine
Opacity/Transparency: 4
Lightfastness Rating: I
Permanency: Excellent
Colour Index Name: PB15:4 / PG7 / PW4
Colour Index Number: 74160 / 74260 / 77947
Munsell Notation Listing:
Hue: 6.0B
Value: 3.95
Chroma: 7.3
Spectrophotometer Readings: N/A
Viscosity Range: 18000-21000 CPS
PH Range: 8.7-9.0
Gloss Average: 91.61
CIE L*a*b* Values: L*39.92 a*-14.38 b*-31.83
Tint Strength: 87.92


The Lightfastness Ratings included in this chart are provided by the American Society for Testing and Materials (ASTM) in the standard for “Artists’ Acrylic Emulsion Paints”. (ASTM D 5098, Annual Book of Standards, Volume 6.02). Colors with a Lightfastness Rating of I are considered Excellent (“Exc.”) and those with a Lightfastness Rating of II are Very Good (“V.G.”). Where Lightfastness Ratings have not been obtained according to ASTM test protocol, “NA” is indicated in the table. In these cases, data from pigment manufacturers and our own test facilities have been used and an appropriate description assigned under Permanency.