ctive adsorbent material, which belongs to amorphous material. Silica gel is a kind of amorphous silicon dioxide, mainly composed of silica. Its chemical property is stable, and it does not burn. Chemical formula isstretch bracelets how to make xSiO2?yH2O. Silica gel contains organic silica gel and inorganic silica gel. Inorganic silica gel is a highly active adsorption material. It is usually prepared by reaction of sodium silicate and sulfuric acid, and a series of post-processing processes such as aging and acid bubble. Household use desiccant, humidity regulator, deodorizer belongsstretch bracelets how to make to inorganic silica gel.Organic silica gel is an organosilicon compound. It refers to a compound containing Si-C bond and at least one organic group, which is directly linked to silicon atoms. It is mainly divided into four categories: silicone rubber, silicone resin, silicone oil and silane coupling agent. There are 4 types of silicone products, moulded silicone products, extruded silica gel products, liquid silica gel products and special silicone products. Silicone rubber is one of organic silica gel and it is one of the moulded silicone products Temperature resistance, weatherability, electrical insulation performance, Physiological inertia, Low surface tension and low surface energy are the outstanding characteristics of organic silica gel. The one we use to make bracelet is named polysiloxanes di-Me Me vinyl vinyl group-terminated chemically. We add curing agent to the soft original silicone rubber and mix them evenly, then put it to molding machine with high temperature of about 200℃, a few seconds later the silicone rubber gets solidified. Here comes the silicone bracelet with custom logo by mould. Characteristic of the silicone rubber stay same on the process but it get more strengthened. onventional one with the color silk printed on the band. It feels plain and smooth. It is suitable to design a colorful logo with the technology of overprint of tiny deviation. But the color logo will be easier fade away than the debossed inkfil one. Different logo can be printed by different method. The regular printing technology is silk print and Overprint. The ink is transferred to the substrate through the graphic part of the mesh via the extrusion of the scraper. The formation of the logo as the original text comes. That is the silk print. The advantage of silk print is that simple equipment, easy operation, easy printing platemaking, low cost and strong adaptability required. If the logo is of more that one color and the colors stand together , then the overprint works. In the printing and dyeing industry, several colors need to be printed on the product , that is so –called overprint. The overprint color sequence should be made according to the features of the inks and the Superimposition rule so as to make the color of the printing close to the original.