aterial. 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 is 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 belongs 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. custom-wrist-sweatbandssiliconeband-ca a normal plain wristband is that we make one mould for every design to make it debossed engraving. When it is extruded the silicone , the logo will be on the wristband. Finally we will fill it with the silicone based ink which is long lasting. A mold is needed for colorfilled wristband. We make a mold and set it in the machine, the high temperature of about 200℃ will solidify rubber into the sharp of bracelet. let"s see how the mould come into being. We can make the serial, QR code or bar code printed on the colorfilled wristband. But need to be wider wristband as 25mm. We can personalize the wristband size as well. The normal size is 202mm length gold silicone wristbandsfor adult,gold silicone wristbands 190mm for women, 180mm for youth and 150mm for child. The width can be 6mm, 12mm, 15mm, 19mm or 25mm. If these not fit you, then you probably need to pay extra for certain size.