Orange Silica Gel Indicator It is our newly developed silica gel indicator-the most revolutionary environmentally friendly silica gel indicator in China. It is semi-transparently orange ε glass ilke in appearance with speherical or lumpy granule. Our orange silica gel indicator has superior moisture adsorption capacity; also it discolors variously with the increasing of moisture adsorption, so it is called "mois ture indicator". It can either be used seperately or goes with ordinary narrow pore silica gel (usually by percentage of 5%). It uses a kind of non-toxic, non-cobalt organic compound as discoloring agent. In this way, it can successfully get rid of cobalt hazard to environment ε human tealth. It disclors from orange into green and at last into blue-purple with variation of moisture adsorption degree [Sizes] 1-3mm 2-5mm 4-8mm [Packing] 25kg per compound bag or 25kg metal pail [Note] Packing and size may be customized per your specific requirements