After glass reaches a recycling center, it is separated by color due to chemical incompatibility. At this point, the glass is crushed into tiny pieces and at times, bits of plastics, metals, and labels are mixed with the glass. Magnets are used to sort the glass. Once the glass is sorted, it is then mixed with silica sand, soda ash, and limestone. The batch is then placed in a furnace and melted to easily reform the glass to any product.