Is this 33COE glass? It comes in translucent white, generally, with patterns.
I have a strange idea and want to know if it is basically boro compatible...
Ermmm... try it and see ;D ;D
Looks like I might have to! ;D ;D
Quote from: garishglobes on March 06, 2010, 09:33:28 AM
Looks like I might have to! ;D ;D
Well.... what happened ??? ;D
I've smashed up an old white pyrex dish and used Northstar sample shorts to add interest. It sometimes works and sometimes cracks. The beads with no addition of rods are fine. I did this with the pyrex before buying some boro to see if my torch could provide enough heat. The pyrex was bought for about 10p in a boot sale so no loss if it didn't work.
There is always that compatability test where you put a thin stripe of unknown glass onto of a thin bit that you know what the coe is. When you pull it out into a hair thick stringer if it coils up where one side is shrinking more (i think thats whats happening) than the other then you know it's not the same coe. I tried it a couple of times and it seems to work rather well. I am sure there are wiser head here than mine who know more about how and why this works! :)
No wiser head needed. That's what happens....
It's probably also worth adding that not all pyrex is borosilicate - apparently, the name was bought some years ago, and is now applied to tempered glass as well as boro - I don't know how this affects cookware, I just put it out there fwiw....
Sean
I did read that the Pyrex name had been bought, but had thought it was relatively recent....I'm looking at 60's cookware here. I think an Oxfam raid is probably in order, we're a bit short of car boot sales round here.
Yes, from what I've read, ity seems to be that older stuff (car boot?) should be boro.
Sean