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| Glass History
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| 2009-5-10
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| Venetial Glassm
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| The origins of glassmaking in the area of the Venetian lagoon date very far back in history, with the first reliable reports of ac......
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| 2009-4-28
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| Conclusion
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| Although this brief history comes to a close nearly 40 years ago, technological evolution naturally continues. Not yet ready to be......
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| Cisank>>News>>Sheet glass skills |
| Sheet glass skills |
| The 11th century also saw the development by German glass craftsmen of a technique - then further developed by Venetian craftsmen in the 13th century - for the production of glass sheets. By blowing a hollow glass sphere and swinging it vertically, gravity would pull the glass into a cylindrical "pod" measuring as much as 3 metres long, with a width of up to 45 cm. While still hot, the ends of the pod were cut off and the resulting cylinder cut lengthways and laid flat. Other types of sheet glass included crown glass (also known as "bullions"), relatively common across western Europe. With this technique, a glass ball was blown and then opened outwards on the opposite side to the pipe. Spinning the semi-molten ball then caused it to flatten and increase in size, but only up to a limited diameter. The panes thus created would then be joined with lead strips and pieced together to create windows. Glazing remained, however, a great luxury up to the late Middle Ages, with royal palaces and churches the most likely buildings to have glass windows. Stained glass windows reached their peak as the Middle Ages drew to a close, with an increasing number of public buildings, inns and the homes of the wealthy fitted with clear or coloured glass decorated with historical scenes and coats of arms. |
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| 『colse』
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