1.1Â This test method is intended to be used to determine the tint undertone (blue or yellow) of titanium dioxide pigments. This relates to the effective particle size of the pigment. It is based upon tinting with a black iron oxide, but other blacks may be used if found suitable.
5.1Â This test method allows the user to make a quick determination of the blueness or yellowness of the tint undertone of titanium dioxide pigments, versus a reference pigment agreed upon by the parties to the test. This is an important measure of tone, since it gives both a measure of effective particle size, and quick approximation of the blue/yellow undertone that can be expected when a coating containing the titanium dioxide is tinted.
| SDO | ASTM: ASTM International |
| Document Number | D6131 |
| Publication Date | June 1, 2012 |
| Language | en - English |
| Page Count | 2 |
| Revision Level | 97(2012) |
| Supercedes | |
| Committee | D01.26 |