ASTM D5007 – Standard Test Method for Wet-to-Dry Hiding Change
Description:
Significance and Use
5.1 Many architectural paints, particularly white and light tints, change significantly in film opacity as they dry. An increase in hiding is sometimes associated with porosity and poor film integrity with conventionally formulated coatings. A decrease can result in a disappointing paint job. The wet-to-dry hiding change is therefore a property of great practical importance.
5.2 This test method can be used in paint specifications and as a short, simple procedure for evaluation and quality control.
Scope
1.1 This test method covers the determination of the change in hiding power of an architectural coating during drying, by visual evaluation of the wet and dry film.
1.2 This test method is not recommended for colors other than white and tints.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
ASTM D5006