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.
Uses : Lead Chromate Pigment is widely used in the industries of painting, printing ink , rubber, plastic and stationery etc.

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 ％