The European Union decided in 1998 that cobalt chloride is a carcinogen and blue silica gel containing cobalt chloride was thus prohibited and disappeared from European and American markets . To meet the needs of the market , our Company developed color-variable silica gel.

In the form of spherical or irregularly-shaped grains, the gel is currently presented either purple, orange or yellow. With silicon dioxide as the chief ingredient, the product performs all the functions of blue silica gel but does not contain cobalt chloride and is therefore innocuous and pollution-free, and its color varies as humidity changes

::Use::

Mainly for drying and indicating humidity of precision instruments, medicine, petrol chemicals, foodstuff, clothing, leather, electric appliances, other industrial gases, etc.

::How to use::

Put proper amounts in a suitable container or package and set the container or package where drying or humidity indication is needed. This gel can be used independently or in combination with other types of silica gel. After changing color as a result of absorbing dampness, the gel can be reused after heating to change back to its pre-use color. Heating is most suitable between 100-120

::Technical Data::

Item		Data
		WG-1	WG-2	WG-3
Absorption %	RH=20%	9.0	9.0	9.0
	RH=50%	22.0	22.0	22.0
Rate of Wearing %		10.0	10.0	10.0
Granularity Eligibility %		90.0	90.0	90.0
Loss After Heating %		2.0	2.0	2.0
Color Variation	RH=20%	Orange-red	Light brown-yellow	Yellowish green
	RH=35%	Light orange-red	Light brown-green	Greenish yellow
	RH=50%	Light orange	Light blackish-green	Light Blue
Original Color		Purple	Orange	Light yellow