Chrome Oxide

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Molecular Formulas as following : Lemon Chromate : 2.5PbCrO 4 PbSO 4 +xAl(OH) 3 +yAlPO 4 Light Chromate : 3.2PbCrO 4 PbSO 4 +xAl(OH) 3 +yAlPO 4 Neutral Chromate : PbCrO 4 +xAl(OH) 3 Dark Chromate : PbCrO 4 +xAl(OH) 3 Orange Chromate : PbCrO 4 +xAl(OH) 3 Characters : Lead Chromate is a kind of bright-coloured yellow pigment with advantages of strong overspreading ability strong tinting strength, resistance to solvent and heat, grinding dispersing easily. Meeting Hydrogen Sulphide in changes into black. Item Technic Index Lemon Chromate Light Chromate Neutral Chromate Dark Chromate Orange Chromate Colour Similar to standard sample Similar to standard sample Similar to standard sample Similar to standard sample Similar to standard sample Tinting Strength ≥ 95 ％ 95 ％ 95 ％ 95 ％ 95 ％ Lend Chromate ≥ 55 ％ 48 ％ 90 ％ 85 ％ 55 ％ Hiding Power g/m 2 95 60 55 45 45 Matter soluble in water ≤ %(m/m) 1.0 1.0 1.0 1.0 1.0 Matter soluble at 105 0 C ≤ (m/m) 2.5 1.5 1.0 1.0 1.0 Acid value (Draw Wa tax) ≤ 4 － 8 4 － 8 4 － 8 4 － 8 4 － 8 Oil sbsorption value (g/ 100g ) ≤ 25 25 22 20 15 Residue on sieve 0.5 ％ 0.5 ％ 0.5 ％ 0.5 ％ 0.5 ％

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XI'AN GREEN CHEMICIALS CO LTD

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