Posts Tagged "glass blowing"

Potato in Glass

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Potato in Glass

Dipping a potato in a hot glass furnace may seem like an odd thing to do. This is actually an old glass factory trick. This little known trick helps with melting clean, bubble-free glass… And there is some actual science to back this up.   Melting a pot of glass We fill the glass furnace with the raw materials for glass, known as ‘Batch’. Here is a link for more information and a video about what is in our glass. The cycle for melting glass is known as charging… And putting batch into the furnace is known as – “throwing in a charge”. It...

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Glass Blowing – blocking and papering hot glass

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Glass Blowing – blocking and papering hot glass

A short video clip of Bernard Katz with his glass blowing team blocking and papering a hot gather of glass. This is the final gather of glass for a custom glass sculpture. The video clip was taken during one very hot humid day in August.  When glass blowing wet wooden blocks and wet folded newspaper is used to shape hot gathers of glass. The hot glass is actually riding on a thin layer of steam between either the wet wooden block or wet newspaper. The blow pipe has to be constantly turning when riding on this layer of steam. If the blow pipe stops turning while in contact with the wooden...

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Glass Blowing – marving hot glass sculpture

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Glass Blowing – marving hot glass sculpture

A short video clip of Bernard Katz glass blowing shaping a hot glass sculpture on a marver table. This video clip shows Bernard Katz marving hot glass on the marver table to chill and shape areas of the glass piece in progress. The thick steel table is called a “marver”. A marver table is an essential piece of equipment in any glass studio. The cold steel table pulls heat from the hot glass. This allows the glass blower to chill certain areas of a glass piece while shaping the form. You can see Bernard’ s finger tips rolling the blow pipe to shape the glass form. This...

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Glass Blowing – necking glass with jacks

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Glass Blowing – necking glass with jacks

A short video clip of Bernard Katz and his glass blowing team working on a custom glass sculpture. This video clip shows the glass blowing team necking glass during the blowing process. Using a glass blowing tool called “jacks”, Bernard is creating a “neck line” in the glass sculpture. This is important because when the piece is eventually transferred to the punti from the blow pipe, this creates a break point in the glass piece. If this were a traditional vase, the break point would become the top of the vase or opening. In the video you can hear a little...

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Glass Blowing – using torches on glass sculpture

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Glass Blowing – using torches on glass sculpture

A short video clip of Bernard Katz and his team blowing glass during one very hot humid day in August. This video clip shows the glass blowing team using bench torches to spot heat a piece in progress. While working on a custom glass sculpture with custom colors using the bench torches helps keep areas of the piece hot. This can keep a glass piece from cracking if areas get too cold. We also use this torching method to add extra heat to parts of the piece we are working on. We use these bench torches extensively between trips to the glory hole when working. They are an important tool in...

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