don"t know the word "fuel injection" . The main purpose of fuel injection is to coat the surface of the produdebossed silicone braceletsct with a coat of paint to make it more comfortable for customers to wear . Oil injection has a good effect on the dust-proof and sticky-proof properties of silica gel bracelets . For example , some customers will ask us why the silicone wristband are often covered with dust . Actually , the reason why rubber bracelet often stick to dust is that they don"t have any spray hand-feeling oil . The effect of silicone bracelets sprayed with hand-feeling oil is hard to see with the naked eye , and there is a distinction between the wristband sprayed with hand-feeling oil and non-spraying hand-feeling oil when we touch it . The main features of oil-sprayed silica gel hand rings are smooth handle , high surface finish and smoothness , no dust contamination . Silicone hand rings without spray-feeling oil have low gloss , feel less smooth with hands , and their service life is not long . icone bracelet touches smoothly with special surface treatment and easily stick with dust , hair and other impurities. Third, when it burned with fire, the false silicone bracelet will come up with the black material on the edge while debossed silicone braceletsthe true one shows white powder. And final, tell a reliable method to clean the bracelets. Get it soak in warm water for 3-5min, rub a few and add the detergent if necessary. Then all done after drying by air. After proper dewatering , the silica gel mSiO2?nH2O become a porous mass that is of different particle size. This is so called the silicone. The silicone has the open vesicular structure , large specific surface. So it can absorb many substances as a good desiccant, adsorbent and catalyst carrier. Adsorption of the silicone is mainly the physical one that can be regenerated and good for repeated use. Let the silica gel soak in the cobalt dichloride solution then get it dried and activated , will become the allochroic silica gel. It will transfer from blue to red color when absorb water. Changes in color shows the degree of water absorption and whether need the regeneration treatment.