ultramarine blue

Ultramarine Blue Formula: Na6Al4Si6S4O20 Molecular weight: 862.60578 Ultramarine Blue, Pigment Blue 29, is an inorganic pigments whose color is blue. It is a sodium alumino-sulphosilicate. This pigment is the synthetic form of Lazurite. Compared with other blue pigment or dyes, ultramarine blue has the advantages of clean and bright reddish blue shade. Ultramarine Blue is good at white correcting that covers yellowish shades. This whitening characteristic is widely applied in many fields, e.g. detergent & Soap, plastics and rubber, paints and coating, etc. The specs are as the following: ITEM Index Result 1 FullShade Approx Mately Approx 2 DE +1.0 +0.7 3 TintingStrength(Comparedwithstandardsample) 100+3% 102% 4 SoluteinWater ≤0.2% 0.15% 5 FreeSulfur ≤0.05% 0.04% 6 VolatileMatter(105+2°C) ≤1% 0.7% 7 SieveResidue(240mesh) ≤0.08% 0.02% 8 OilAbsorption 30-40 33 9 ThermoStability ≥300°C 300°C 10 PHvalue 8-10 8 11 LeadContent≤ ≤90ppm 84 12 Cadmium N.D. 13 Mercury N.D. 14 Arsenic N.D. 15 HexavalentChromium(Cr+6) N.D. 16 Specificgravity 2.35g/cm3 testmethod:GB21782-2008 17 Tapdensity 0.5g/cm3 GB52118-1985 17 Meanparticlesize 1.4micron GB/T21865-2008