Clear glass is the most popular type of glass used in construction, accounting for about 70% of all glass production. The cullet obtained from the manufacture of products from clear glass is not considered hazardous waste and can be used to make new glass without any prior preparation. Today, most glass manufacturers actively add clear cullet to the glass batch when producing float glass and glass containers.

Covered glass is a clear glass covered depending on the purpose of its use. The most popular covered glass found in every home is the mirror. A thin layer of special paint made of metals such as tin, silver, copper, lead, and others is applied to a sheet of clear glass. Each mirror manufacturer has its own covering formula, which may differ slightly from others, but they are essentially similar. Mirror glass cullet obtained during the manufacture of products may be hazardous if the covering contains dangerous metals. Even if the mirror does not contain hazardous substances, mirror cullet cannot be reused to make clear glass, as impurities will clog the melting equipment and reduce the degree of transparency of the resulting glass. Mirror cullet must undergo mechanical and chemical processing to remove all impurities and obtain transparent glass waste suitable for reuse. In addition to mirrors, there are also back-painted glass, architectural glass, decorative glass, coated glass, energy-saving glass, etc., which can also be classified as covered glass.

Colored glass is glass in which paint is added to the glass mass during production, coloring the glass itself. To obtain clear cullet from such glass, it must be melted and chemically treated to remove the paint. However, this method is not used, as it is not cost-effective.