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jxmiller · 10-29-2009, 02:16 AM

I have not looked into it too much but here you go.

Quote:

Glass, such as borosilicate glass, that is heat-treated or leached to remove alkali so that it withstands high heat and sudden cooling without shattering.

And here is something interesting. A mix of borosilicate & pyrex. I know nothing about pyrex, can you melt it easier than glass? I would think the combination would still require a torch due to the melting properties of borosilicate. Borosilicate has a much higher melting point than common glass.

Please read the Wiki on Borosilicate. And pay attention to the nichrome part I am quoting below.

Quote:

Aquarium heaters are sometimes made of borosilicate glass. Due to its high heat resistance, it can tolerate the significant temperature difference between the water and the nichrome heating element.

Also I had mentioned earlier that I know a "Glass Blower". If you read on in the wiki... it states marijuana pipes are made from borosilicate glass. The glass blower I know would therefore have a good stash of it then. I imagine he would probably have a wealth of knowledge in the subject as well.

roadkilldeluxe · 10-29-2009, 02:43 AM

I thought Pyrex was a type of borosilicate glass, but it will be harder to melt than regular glass. I am interested in these pyrex tubes.

After looking over the wiki article, borosilicate looks like it could be promising. However, I am not sure that quote is accurate. "High heat resistance" suggests it does not conduct heat well, but it's ok in thermal conductivity. It probably means it has a very low thermal expansion coefficient, which is what breaks glass, large contractions and expansions. If you are still considering dipping the coil in it, be aware that the Nichrome will expand more than the boro.

But what exactly is your plan right now? Are you still trying to pursue a dipped coil? If so, you should definitely ask your friend for more info! I would love to see someone try it.

crip · 10-30-2009, 02:30 AM

Pyrex is just a name brand for Boro glass but Pyrex baking goods are a lil different,,

Boro is hard glass less prone to shattering but it still happens..

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10-29-2009, 02:43 AM	#12
roadkilldeluxe Full Member Join Date: Sep 2009 Location: MN Posts: 120 Tweet this post!	I thought Pyrex was a type of borosilicate glass, but it will be harder to melt than regular glass. I am interested in these pyrex tubes. After looking over the wiki article, borosilicate looks like it could be promising. However, I am not sure that quote is accurate. "High heat resistance" suggests it does not conduct heat well, but it's ok in thermal conductivity. It probably means it has a very low thermal expansion coefficient, which is what breaks glass, large contractions and expansions. If you are still considering dipping the coil in it, be aware that the Nichrome will expand more than the boro. But what exactly is your plan right now? Are you still trying to pursue a dipped coil? If so, you should definitely ask your friend for more info! I would love to see someone try it.

10-30-2009, 02:30 AM	#13
crip Full Member Join Date: Oct 2009 Location: A-town Cali Posts: 29 Tweet this post!	Pyrex is just a name brand for Boro glass but Pyrex baking goods are a lil different,, Boro is hard glass less prone to shattering but it still happens..