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Until the 20th century, window glass production involved blowing a cylinder and flattening it. [9] Two major methods to make window glass, the crown method and the cylinder method, were used until the process was changed much later in the 1920s. [10] All glass products must then be cooled gradually , or else they could easily break. [11]
Glassblower creating a hollow cylinder as the first step for window glass. Glassmakers use the term "batch" for the sum of all the raw ingredients needed to make a particular glass product. [1] To make glass, the glassmaker starts with the batch, melts it together, forms the glass product, and gradually cools it.
Until the 16th century, window glass or other flat glass was generally cut from large discs (or rondels) of crown glass. Larger sheets of glass were made by blowing large cylinders which were cut open and flattened, then cut into panes. Most window glass in the early 19th century was made using the cylinder method. The 'cylinders' were 6 to 8 ...
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Door frame or window frame, fixed structures to which the hinges of doors or windows are attached; Frame and panel, a method of woodworking; Space frame, a method of construction using lightweight or light materials; Timber framing, a method of building for creating framed structures of heavy timber or willow wood
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