The melting point of glass varies by type and cannot provide a uniform value. Glass is a mixture, non-crystalline, and therefore has no fixed melting boiling point. The transformation of its state from solid to liquid is carried out within a certain temperature range, which is called the softening temperature range, rather than a single melting point. For example, lead glass has a softening point of 500 degrees, while quartz glass has a softening point of 1600 degrees. In addition, the glass can be softened with a fire at 600 degrees for processing such as wire drawing