Significado e uso

5.1 The quality standard for artist’s coatings requires the evaluation of various appearance characteristics of the coating film. Coloring strength determination (test method D4838) requires, in particular, the preparation of scratch coatings for colorimetric measurement. Other evaluations such as color designation, transparência, lustro, and color difference measurements also require pull-down samples.

5.2 The artist’s tube paint has a paste consistency that makes traditional film coating methods difficult to use, especially for dry paints.

5.3 Artistas’ coatings differ in two properties that are important for film preparation, namely transparency and drying time. Colorimetric determination and some other types of evaluation require completely hidden substrate paint samples. Very transparent coatings require such a thick film to be completely covered, dry time is too long or the sample surface is flawed. When complete cover-up is required, this practice aims to provide an opaque film without these defects by applying a series of films.

Prática padrão ASTM D4941-16 para fabricação de revestimentos colados por artistas

Etapa 1: Escopo

1.1 This practice includes the production of uniform films of artist tube coatings and other non-flow pigment coatings using coatings designed for low viscosity coatings.

1.2 Includes information on how to obtain opaque samples from these coatings.

1.3 Valores expressos em unidades do SI serão considerados padrão. Os valores dados entre parênteses são apenas para referência.

1.4 Esta norma não se destina a abordar todas as questões de segurança, caso existam, associado ao seu uso. É responsabilidade dos usuários desta norma estabelecer práticas adequadas de segurança e saúde e determinar a aplicabilidade das restrições regulatórias antes do uso..