CWK is a medium-sized growth-oriented chemical company active all over the world. We have over 170 years of experience in the development, production and marketing of highly innovative products. We offer to our customers a wide range of competitive products and services in the following sectors: Silicas - Colloidal silica, silica gels Molecular Sieves - Zeolites in powder and beads form Sulfur Compounds - Thiosulphates, sulphites, photographic che...