一. Glass Types and General Properties ⚫ Definition and characters- an inorganic substance fused at high temperatures and cooled quickly ⚫ About the principle component -silica (quartz), ⚫ The ingredients of the components and different formulations. ⚫ Other mineral compounds be used to achieve improved properties: decolorizers – to clear; colorants– change the appearance. ⚫ Other glass types used for special packaging purposes. lead compounds, boron compounds, borosilicate glasses. ⚫ The problems of different formulations include soda-lime and regular container glass are mixed when recycling.一. Glass Types and General Properties ⚫ Definition and characters- an inorganic substance fused at high temperatures and cooled quickly ⚫ About the principle component -silica (quartz), ⚫ The ingredients of the components and different formulations. ⚫ Other mineral compounds be used to achieve improved properties: decolorizers – to clear; colorants– change the appearance. ⚫ Other glass types used for special packaging purposes. lead compounds, boron compounds, borosilicate glasses. ⚫ The problems of different formulations include soda-lime and regular container glass are mixed when recycling