Glass Making Process

Glass is a combination of silicious substances (i.e. sand) with one of fixed alkalies (i.e. soda) and also limestone. First, the sand, soda and limestone must first be finely granulated into powder. After the coarse parts are sifted out, the materials are mixed in the proper proportion (10 sand : 17 soda : 5 limestone) and put in the furnace for fiver or six hours. While the materials are heated in the furnace, they must be frequently stirred. After five or six hours, the matter is called frit and divided into two parts. The first part is used to make plate-glass. The frit is easily converted into glass by only pounding and rolling the frit. Sometimes, flux is added in a small portion to correct any fault in plate-glass. The second part is used to make bottle-glass. The frit is poured into a removable mould. When the frit turns into solid, the mould can be removed. The important thing that should be given more attention to get well-made glass is the furnace. The heat in the furnace should be brought on gradually to make a clear glass.

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