Specifications for lime-flint glass tumblers.

by United States. Bureau of Standards.

Publisher: Govt. print. off. in [Washington

Written in English
Published: Downloads: 484
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  • Glass manufacture.

Edition Notes

SeriesCircular of the Bureau of Standards -- no. 119
The Physical Object
Pagination3 p.
ID Numbers
Open LibraryOL22966631M
LC Control Number22026168

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Specifications for lime-flint glass tumblers. by United States. Bureau of Standards. Download PDF EPUB FB2

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Glass is much softer than agate, jasper, and most other rocks that are typically processed in a rock tumbler. Glass has a hardness of between four and six on the Mohs Hardness Scale while agates and jaspers have a hardness of about seven.

Glass is softer than agate. It will take less time to tumble. We usually skip the coarse grit step. Reading glasses with Trivex lenses are also lightweight and resistant to breakage, but they aren’t as likely to distort images as polycarbonate lenses are.

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If you've been wearing glasses for a long time, your brain gets used to this and can find it hard to adjust if the prescription is changed.X-Ray Specs were improved (U.S. Patent 3,) by Harold von Braunhut, also the inventor of Amazing Sea-Monkeys.

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