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Lanxess patents yellow iron oxide pigments



Published May 9, 2011
U.S. 7,799,125 B2

Lanxess Deutschland GmbH has received a patent for a yellow iron oxide pigment having an oil absorption value of less than 25 and either an a* value of greater than 4.3 measured by CIELAB units in white reduction in L64 according to DIN 6174 and/or a b* value of greater than 34 measured by CIELAB units in white reduction in L64 according to DIN 6174 or an a* value of greater than 10 measured by CIELAB units in full shade according to DIN 6174 and/or a b* value of greater than 45 measured by CIELAB units in full shade according to DIN 6174 and a reduction ratio for standard depth of shade B 1/9 according to DIN 53235 Part 1 and 2 of less than or equal to −6.5.


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