Self Indiacting Silica Gel

we are india's largest manufacturer of silica gel. Self-indicating silica gel will adsorb moisture in exactly the same way as standard non-indicating (white) silica gel, but they will literally indicate when they are becoming saturated by changing their color.     silica gel blue in this type all the gel particles are impregnated with an indicator. When free from moisture the crystals of silica gel are blue. 
as they are put to use, the crystals can take up moisture, it gradually turns pink and gives a ready indication that done its work and need replacement or regeneration. descriptionsilica gel blue (indicating type)shape  sizes irregular assay (as sio2) min 97% loss on drying % less than 3 % adsorption capacity @ 95% humidity 30 wt % min. bulk density (gml) 0.65 - 0.75 ph (in 10 % aqueous solution)   5 - 8 friability 99.5 chloride (as nacl) max 0.5% cobalt chloride (as cocl2)  0.5 % min. sulfates (na2so4) max 0.5%.