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product type |
chromium oxide Cr2O3, GRER
17 |
CHROMIUM OXIDE CR2O3, GRER 17
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1. Description |
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Chromium oxide green is synthetic pigment with high content of Cr2O3.
For the high content
of Cr2O3
and high melting point (2450 ° C) is mainly used as an additive
to furnace walling for the production of anticorrosive and
refractory surfaces. For its high light resistence and stability
it is also used for the production of coating compositions (when mixed with cheap black pigment you
can reach many important tints - RAL 6001, 6002, 6010, which you
can only get when you use more expensive organic phthalate
pigments), stuffs, colour bricks, tiles, roofing, rubber,
plastics, etc.
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2. Chemical properties |
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Cr2O3 |
GRER17 |
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Cr2O3 |
% min |
99 |
99 |
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Content of Al2O3 + SiO2 |
% max |
0,3 |
0,4 |
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Matters
soluble in water |
% max |
0,1 |
0,1 |
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2. Physical properties |
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Colour
data - CIELAB 10° ,
D65 |
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CIE L |
45,4 |
45,6 |
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a* |
17,19 |
16,2 |
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b* |
18,8 |
17,6 |
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delta E |
2 |
2 |
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Residue
on sieve 63 µm |
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% max |
0,1 |
0,1 |
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pH |
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6-8 |
6-8 |
| Moisture |
% max |
0,15 |
0,15 |
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3.
Packing:
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25
kg multiply paper bags, 1 pallet / 1000
kg, shrink-wrap |
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Laying of asphalt mixture coloured by the pigment
CK 835.
Recommended dosage for the pigment
into asphalt mixtures is 3-5 % for the whole weight of the
mixture. The temperatures around 200 ° C that usually
occures during the production of asphalt mixtures do not
cause any problem for most of our pigments. We recommend
to use only pigments on the basis of metal oxides because
of their higher stability and resistance – for green tones
chromium oxides, for the rest iron oxides.
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