Science Source General Science
EN_90286235_0302
Silica gel used in packaging for a CD player. Silica gel is a granular form of silica, synthetically manufactured from sodium silicate. It has an extremely high porosity, making it a highly effective adsorbent material. The large internal surface area enables each granule to attract and hold moisture through physical adsorbtion and capillary condensation. Packaged in a semi-permeable packet, silica gel is used as a desiccant to keep a variety of packaged goods dry, often used in electronics packaging. Although silica gel is inert and non-toxic, indicator substances are often added to it which change color when moist. These substances are often toxic which is why the packets are usually labeled as such.
2010-02-13
EAST NEWS
Science Source
Mark Burnett
2x6296
1,02MB
19cm x 29cm przy 300dpi
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