Are these any restrictions in the choice of pigments for paints based on unsaturated polyester resins ?
Paint based on unsaturated polyester resins
can often be formulated with relatively low pigment contents e.g. 10% because they are applied thickly and have good hiding power even at low pigment volume concentrations. Because of this, pigments are easily dispersed in the paint. It is, nonetheless, important to ensure that only those pigments are used which do not affect the reactivity of the paint of its shelf life.
which are less suitable, for example, include anatase, carbon black and metallic pigments, unless these have been specially formulated for this particular application. Similiar restrictions, incidentally, apply to fillers used in such formulations.