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Significance and Use
5.1 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.
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.
1.3 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D344 Test Method for Relative Hiding Power of Paints by the Visual Evaluation of Brushouts
D523 Test Method for Specular Gloss
D1475 Test Method For Density of Liquid Coatings, Inks, and Related Products
D1729 Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials
D5068 Practice for Preparation of Paint Brushes for Evaluation
D5069 Practice for Preparation of Paint-Roller Covers for Evaluation of Architectural Coatings
D6762 Test Method for Determining the Hiding Power of Paint by Visual Evaluation of Spray Applied Coatings
E1347 Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry
ICS Number Code 87.040 (Paints and varnishes)
UNSPSC Code 46181533(Protective coats)
ASTM D7489-09(2013), Standard Practice for Evaluating Touch-Up Properties of Architectural Coatings under Various Environmental Conditions, ASTM International, West Conshohocken, PA, 2013, www.astm.orgBack to Top