Melting Pot Wiki - User contributions [en]

Graal

2012-02-18T10:08:01Z

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Hothead

2012-02-18T06:08:26Z

178.137.18.178: /* HotHead */

'''
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Visible Light Hazards

2012-02-18T01:14:44Z

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2012-02-17T22:17:10Z

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Phantom

2012-02-17T20:10:39Z

178.137.18.178: /* Cooling */

[[Image:GTT_Phantom.jpg|thumb|GTT Phantom (2-stud version)]]
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== Triple mix ==

A patented system from GTT that has a center injector of oxygen. This, mixed with how the ports built on the Outer oxygen port, create a very hot flame with alot of control and variation in flame character and atmosphere.

== Tips ==

* Always keep your inner oxygen cracked (blue knob)
* Routine maintenance should be done monthly using a nichrome wire and a small wire brush, or possibly more often if you fume regularly

== Links ==

* [http://www.glasstorchtech.com/index1.html Glass Torch Technologies Web Page]
* [http://www.thegldg.com/forum/attachment.php?attachmentid=2152&d=1148190101 US Patent 5803725 - GTT Inner Workings]

[[Category:Tools]]
[[Category:Torches]]

Cold seal

2012-02-17T17:00:06Z

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Borosilicate

2012-02-17T12:48:49Z

178.137.18.178: /* Manufacturing process */

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== Composition and physical characteristics ==

Borosilicate glass has a very low [[COE]], about one-third that of soda lime glass. This reduces material stresses caused by temperature gradients, thus making it more resistant to breaking. This makes it ideal for use in telescopes and labware.
Borosilicate glass begins to soften around 821 °C (1510 °F).
Borosilicate glass is less dense than soda lime glass.

While more resistant to [[thermal shock]] than other types of glass, borosilicate glass can still crack or shatter when it is exposed to extreme temperature changes. Annealing can mitigate some of these properties, but it is an inherant property of glass, with quartz glass being the most shock resistant. When broken, borosilicate glass tends to crack into large pieces rather than shattering.

'''Fraction by weight'''
<table class="wikitable">
<tr>
<th>Element</th>
<th>Fraction</th>
</tr>
<tr>
<td align=center>B</td>

<td>0.040064</td>
</tr>
<tr>
<td align=center>O</td>

<td>0.539562</td>
</tr>
<tr>
<td align=center>Na</td>

<td>0.028191</td>
</tr>
<tr>
<td align=center>Al</td>

<td>0.011644</td>
</tr>
<tr>
<td align=center>Si</td>

<td>0.377220</td>
</tr>
<tr>
<td align=center>K</td>

<td>0.003321</td>
</tr>
</table>

'''Physical characteristics'''<br>
Density = 2.23 g/cm<sup>3</sup><br>

== Usage ==

Borosilicate is most often employed where a glass would be subject to swings in temperature, such as labware and glass pipes.

Artists and craftsman choose to use borosilicate due to the colors that are available, the working properties, thermal properties, and many more reasons.

[[Category:Materials]]