desiccant or silica gel in white paper packaging and spread on black background, anti mildew gel

absorb absorbent absorption adsorbent adsorption agent amorphous anti antichill artificial background bag black capacity chemistry closeup control corrosive desiccant dioxide dry drying effective gel granular granules isolated macro mildew moisture nontoxic package porous prevention product round silica silicon silicone small sodium solution spherical substance synthetic translucent transparent