ASTM D3723 – Standard Test Method for Pigment Content of Water-Emulsion Paints by Low-Temperature Ashing
Description:
Significance and Use
3.1 This test method is used by paint producers and consumers for product process control and for product acceptance.
Scope
1.1 This test method covers a procedure for the pigment content determination of water-based paints. It is applicable only to pigments that do not decompose or lose weight at temperatures below 500 °C. Such pigments include most metal oxides, silicates, and a majority of anhydrous inorganic salts.
1.2 Many water-based paints contain pigments and organic colorants that lose water of hydration or decompose at this temperature. The residual ash should be carefully inspected for changes in color or texture that could indicate a pigment alteration and hence lead to erroneous results. Caution should therefore be exercised when applying this test method to samples containing unknown pigment compositions.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
ASTM D3720