Crazing is a glaze defect of glazed pottery. The two main types of solar air panels are glazed and unglazed. Semi-vitreous stoneware may be glazed like faience. It can be unglazed, painted, slip glazed, or glazed. They can either be glazed or unglazed. In 1958 the observation windows were glazed with shatterproof glass. Pictures were painted on plain rectangle tiles, glazed and fired afterwards. All three are made in glazed and unglazed varieties, for different purposes. There was also a softer stoneware, which was glazed and decorated. They are glazed and framed with timber. Baked pirozhki may be glazed with egg to produce golden color. These were mainly made from faience and glazed blue. Included are the mixing proportions for mortars in masonry, brickwork and glazed tile. Leaching of heavy metals occurs when ceramic products are glazed incorrectly or damaged. Hundreds of crates of glazed brick fragments were carefully desalinated and then pieced together.