1.1 This practice determines the ability of a paint to be recoated or “touched up” in small areas. Variations in color, gloss, and sheen that result in a different appearance from the original paint can be evaluated visually.
1.2Â This practice describes evaluation of touch-up characteristics in a laboratory-scale controlled environment as opposed to a full-scale field environment.
1.3Â Evaluation of touch-up properties under constant drying conditions is described. Environmental conditions can be adjusted to incorporate high or low temperature drying , or both. The changes in application temperature can lead to larger differences in touch-up than applying both coats under the same environmental conditions.
5.1Â During construction of a home, paints are subjected to a wide variety of drying conditions, and this may exhibit differences between the original coat and the touched-up area in appearance after its full cure. Therefore, it it essential for the paint to be able to perform under a wide variety of drying conditions. A paint that does this is very advantageous to the contractor.
| SDO | ASTM: ASTM International |
| Document Number | D7489 |
| Publication Date | July 1, 2013 |
| Language | en - English |
| Page Count | 5 |
| Revision Level | 09(2013) |
| Supercedes | |
| Committee | D01.42 |