Significance and Use
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.
It is possible for a paint to have excellent color touch-up, but poor sheen touch-up, or vice-versa. The ideal paint will have both excellent color and sheen touch-up under testing conditions.
Color, gloss and base choice can have a major impact on touch-up of the paint.
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.
1.2 This practice describes evaluation of touch-up characteristics in a laboratory-scale controlled environment as opposed to a full-scale field environment.
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.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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
color difference; latex paint; sheen difference; touch-up;
ICS Number Code 87.040 (Paints and varnishes)
ASTM International is a member of CrossRef.
Citing ASTM Standards
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