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How to distinguish the fake and inferior products (two)?
How to distinguish the fake and shoddy products?
One, the silica gel if the surface have no special treatment, then touch up will feel is smooth, because surface layer is a layer of oil
Fat substance
2, false silicone with easy deformation, and true silicone will feel good rebound, pull the permanent deformation is relatively small. You cut the silica gel
The next little bit of fire, if not only to take white smoke and sparks of fire and the burning of the white powder is not the same.
The flavor may also be silica gel, but they are used in the curing agent.
3, silicone rubber surface easy to stick dust, hair and other relatively light impurities.
4, a good silicone no smell, in case of heat does not soften.
5, you the silicone cut under a little fire, fake silicone rubber strap after the fire edge is black, fake silicone rubber was
Fire burning, smoke black, and a stench. But really silica gel, no matter what color of silica gel burning on the edge of white, burning
Remainder is powder. The silicone rubber wristband really is like carbon combustion, flame uniform. White smoke, tasteless. If you use a surface dish
A drop of white powder is collected and a drop of the solution is put into the hot solution (60 degrees) of the solution of 40% sodium hydroxide.
Tube, add two drops of ammonium molybdate, slightly heating, cooling after join a drop of aniline solution and 3-8 drops of saturated sodium acetate solution observed
The color reaction of the solution, if there is a blue description of the silicon element, proved to be silica gel.
This paper is from Shenzhen,, id=566?
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