Main > DESICCANTS > SilicaGel > Moisture Indicator Contg SilicaGel > Moisture Color Indicator SilicaGel > Non-Co Indicator Contg SilicaGel > Co.: UK. I > Patent > Claims Etc > Claim 1: Humidity Indicator Compris > ing: SilicaGel Carrier Impregnated > with Active Indicator consisting: > Iron(II) &/or Iron(III) Salt; Salt > Contg > 1 Cation One of Which is > Fe(II) or Fe(III). Claim 2: Upon > Exposure to a Humid Environment > ; Indicator Undergoes Color Change > & whereinafter Indicator may be > ReGenerated for Re-Use. Claim 3: > Ammonium Iron(III) Sulphate;

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Ammonium Iron(III) Sulphate;'s subsections
Ammonium Iron(II) Sulphate or

Ammonium Iron(III) Sulphate;'s products
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