BS 3900-B8 discusses test methods for paints. The aim of the BS 3900-B series is to provide the best industrial practice to determine the metal content in paint by the spectrometric method.
BS 3900-B9 describes two methods for the determination of the cadmium content of the test solutions prepared according to ISO 6713 or other suitable International Standards. The methods are applicable to paints having “soluble” cadmium contents in the range of about 0,05 to 5 % (m/m). The flame atomic absorption spectrometric method (AAS) should be used as the referee method in cases of dispute.
BS 3900-B8 on liquid paints and dried paint films is useful for:
Various cadmium salts are used in paint pigments, with CdS as a yellow pigment being the most common. Cadmium selenide is a red pigment, commonly called cadmium red.
BS 3900-B9 describes a chemical method for determining the soluble cadmium in liquid paints and dried paint films. BS 3900-B9 covers the principle of the test method, reagents and materials, procedure, expression of result, and test report. This can help to determine the quantity of cadmium present that aids in determining the colour characteristics of the liquid paints and dried paint films.