Лако-красочные материалы — производство

Paul Dunning

3.1

Introduction

Of all the inorganic pigments, cadmiums have the broadest range consisting of brilliant yellow and red colors. The yellows span from pale primrose to deep golden yellow. Reds vary from light orange, progressing to deep orange, light red, through crimson and maroon (see Figure 3.1).

Cadmium yellows are composed of cadmium sulfide or a mixture of cadmium sulfide and zinc sulfide, while reds are a mixture of cadmium sulfide and cad­mium selenide (cadmium sulfoselenide).

Both reds and yellows can be made as a chemically pure type (C. P.), in which case they contain no extenders.

Cadmium lithopones, otherwise known as cadmoliths [1] are cadmium reds or yellows that contain barium sulfate coprecipitated with the pigment.

Although not discussed here, reds made with mixtures of cadmium sulfide and mercury sulfide, are known as mercadiums [2] and have also been produced as lithopones.

3.2