ROPAQUE TH-2000 Hollow Sphere Pigment is supplied as an aqueous styrene-acrylic emulsion with a hollow water filled core. Upon drying the water evaporates leaving an air filled void which provides opacity and excellent insulation properties. The polymeric nature of the shell means that paper coatings containing ROPAQUE TH-2000 are very easy to calender with low temperature and pressure resulting in a smooth surface. The lower calendering pressures mean bulk and stiffness can be retained. The product is suitable for application by size press, rod or blade or curtain coating. It can be used with the common binder types used in the paper industry: styrene-butadiene copolymers, styrene-acrylic copolymers, starch and polyvinyl alcohol. Choice of appropriate thickeners facilitates formulations that address common application methods.