Introduction

Blue silica gel, known as color indicator, can be categorized into cobalt blue silica gel and non cobalt blue silica gel. The particle appearance is glassy and blue or light blue glassy particle. According to the shape of particles, it can be divided into granular type and spherical type, and it also possesses the property that can change into red from the blue color after the absorption of moisture.

Application

1.It is mainly used for antirust and moisture absorption of instruments and equipment and so on, at the same time, it can indicate relative humidity environment through the direct indicator of which blue color turn into red color after the absorption of moisture.

2.With combination of the ordinary silica gel desiccant, it is used to indicate the moisture absorption of desiccant and to determine the extent and relative humidity of the environment. As the silica gel desiccant of packaging, it is widely used in precise instruments,leather, shoes, clothing, food, medicines and household appliances.

Technical Specifications

ltems		Indicators
		Blue Silica Gel
		Blue Silica Gel With Cobalt			Blue Silica Gel Without Cobalt
		I	II	III	Blue Silica Gel Without Cobalt
Adsorption capacity (25℃)%	RH=20%≥	8.5	8.0	8.5	9.0
	RH=35%≥	14.0	13.0	14.0	15.0
	RH=50%≥	22.0	20.0	22.0	23.0
Qualified ratio of particle size	%≥	95	95	95	95
Qualified Ratio of Spherical Particle	%≥	90	90	90	90
Loss on heating	%≤	2.0	2.0 2.0 2.0
Color Changing	RH=20%	Blue or light blue	Blue	Blue	Blue or dark blue
	RH=35%	Purple or purplish red	Light blue	Blue-purple	Blue-purple
	RH=50%	Light pink or pink	Blue-purple	Purple-red	Purple-red