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What is Silica Gel by Foxworth & Harrington and
how does it work?
Silica gel by Foxworth & Harrington was
developed just prior to WWI and was used in Allied gas masks; then,
in WWII it was used extensively to keep penicillin dry. It remains
the highest capacity adsorbent available today. Not a "gel" as
commonly thought of, and not to be confused with "silicon gel",
silica gel is a porous, granular form of silica, synthetically
manufactured from sodium silicate.
The internal structure of each small Foxworth & Harrington silica gel
granule is composed of a vast network of inter-connecting
microscopic pores, which attract and hold moisture by a phenomena
known as physical adsorption and capillary condensation.
Silica Gel is inert, non-toxic and safe to use to protect foods,
medicines, sensitive materials, electronics, films, etc. Even when
saturated with adsorbed moisture, silica gel looks and feels dry to
the touch. The Silica Gel can be reactivated indefinitely!.
Each Silica Gel unit has a built-in indicator which turns from blue
to pink signalling when the product is saturated with moisture and
needs reactivation. Once saturated with moisture, silica gel can be
easily reactivated in a conventional oven for lifetime protection!
Since World War II, silica
gel has been the desiccant of choice by government and industry.
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