Лако-красочные материалы — производство

Specifications for thermoplastics are given in Table 1.1 (“Thermoplastics”). Specifi­cations for poly(vinyl chloride) are also listed (“PVC”). These specifications include methods for producing basic mixtures for testing pigments in PVC and for specimen preparation. A method is described for determining bleeding, i. e., the migration of coloring matter into a material in contact with the sampling equipment. Special procedures are also included for the determination of heat stability and increase in strength caused by cold rolling.

Building Materials For standards, see Table 1.1 (“Coloration of building materials”). The following tests are prescribed for assessing the suitability of a pigment for color­ing cement and lime-bonded building materials:

— Relative tinting strength

— Colorfastness in cement

— Colorfastness in lime

— Lightfastness

— Heat stability

— Influence of the pigment on the hardness of the building material

— Influence of the pigment on setting properties

Paper and Board

For standards, see Table 1.1 (“Opacity” and “Transparency”). Methods of measure­ment are specified for the reflectance of paper and board (nonfluorescent), and the opacity or transparency of paper (to measure the transmitted light).