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Glue Chipping Extra-Clear Glass...

Hand Lettering topics: Sign Making, Design, Fabrication, Letterheads, Sign Books.

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Larry White
Posts: 1213
Joined: Thu Apr 08, 2004 4:18 am

Glue Chipping Extra-Clear Glass...

Post by Larry White »

David Trujillo once told me that extra-clear glass chips differently than standard green glass. Has any one encountered this? What is the difference? I haven't done any experiments as of yet....

...Pat probably knows...
Larry White
That's enough for now... it's gettin' late
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Patrick Mackle
Posts: 478
Joined: Thu Apr 08, 2004 10:21 am
Location: Monrovia, Ca.
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Post by Patrick Mackle »

Larry,
Regular plate glass such as the type commonly seen in store fronts and residential windows has a lot of iron in it. When viewed against paper or on edge it has a greenish cast even though it is called clear plate glass.
The more recent "water white" or "optically clear" low iron glasses marketed under the STARPHIRE and DIAMANTE name glass still have a slight grayish or blueish cast but are significantly clearer than clear plate. This is because they have a much lower iron content. This glass is also softer than clear plate.
These water white glasses can also be nearly twice the cost of plate glass, partially because they are heated to a higher temperature which uses more energy and shortens the life of refractory brick lining in the melting furnace due to the fact that molten glass is very corrosive and dissolves the alumina bricks.
Personally I have noticed that these softer low iron glasses scratch, cut, sandblast, wheelcut, acid etch, and bend easier than regular clear plate, so it figures that they might gluechip differently as well.
Pat
Larry White
Posts: 1213
Joined: Thu Apr 08, 2004 4:18 am

Post by Larry White »

Can we start a column..."Just Ask Pat"...? :D

Thanks man....

-LW
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