Borosilicate Glass on ebay Warning

[knexmaster]

I have been listing glass on ebay for several years now and follow a lot of the boro glass for sale on ebay. I also now work for Kimble and sell their glass as well.

Kimble produces mainly two types of borosilicate glass, Kimax KG-33 a 33Coe glass and N51A a 55Coe Glass. N51A glass is still considered a Borosilicate glass but would be in compatible with the 33 COE glasses we generally use.

I have noticed several listings on ebay for Kimax glass and calling it Pyrex as a generic name without giving the COE value and some reference to the N51A type. Such as, "can be melted with a propane torch." or going to their seperate website and all of the listings are under N51A.

I have emailed these sellers and asked them to clarify there listings on ebay or I will have ebay remove them. Until that happens I wanted to put out the warning.

If you buy boro glass off of ebay, please make sure you know what the COE is or compatibility.

I would hate for someone to buy glass just because it was cheap and then spend a lot of time and have their projects crack and then start saying Kimble glass was bad because all of their projects cracked when they didn't have the right glass to begin with.



David
Kansas-Glass (http://stores.ebay.com/Kansas-Glass)

[steven p selchow]

makes sense..uninformed or wrong info can lead to bad publicity for what I consider a good glass.

I started with pyrex 7740, only because thats what I was given, it was supplied at no charge to me. Then we went with the 30lb cases of kg 33 kimble, I actually liked that better because it melted super clean, and it was also free to me, so I stuck with that for about 1

[Swampy]

the boro police heh heh

David! Thanks for looking out for us, seriously. I didn't know about that and yes that would really fuck someone up if they bought that stuff and sunk a wad of cash into it.

Why not list the sellers here so we know who you are chatting about or pm me so I know, it wouldn't go further than me if you did.

[chayes]

boro police

[knexmaster]

ratsglass

www.ratsglass.com

[Swampy]

Well I learned something else today.

The site says;
Kimax Type N51A glass provides superior resistance to heat.

So what do they use that material for then, neon signage or what?

[knexmaster]

N51A is pharmaceutical glass, vials syringes etc. melts at a lower temp and is easier to form. Still considered a borosilicate glass but has a 55 COE.

Kimble, Schott, Alcan that I know of, all make this type of glass. It is generally only sold to pharmaceutical converters so it should not be out in the general public, as it will create a lot of confusion esspesialy when being sold as Pyrex which it is not even close.


Kimax KG-33 is what we all want to use

David
Kansas-Glass (http://stores.ebay.com/Kansas-Glass)

[Swampy]

Thanks for the clarification David, preciate that.