trout_tapout Posted May 19, 2010 Report Share Posted May 19, 2010 Hi guys, I have been pouring plastics for about 5 years now about twice a week, and in that time have heard the stories of Pyrex / Anchor cups shattering in extreme temperature changes. I even experience this once when I used to pour in my garage in Buffalo NY in the middle of winter, and my hot pyrex touched some cold wet surface and it cracked. But this time was different: Today I was using a newer Anchor heat tempered cup and it shattered. We had actually emptied the cup already and poured the hot plastic into a metal vat, and the cup was just sitting on the counter for a few minutes when it made a loud POP and busted into a million little pieces. The air temp in the shop was upper 60's. And it was sitting on a dry wooden counter. I consider myself lucky that I was not holding the cup of hot plastic when it happened. I am going to get eye protection and heat mits this week. Be safe everybody! Josh K Quote Link to comment Share on other sites More sharing options...
bojon Posted May 22, 2010 Report Share Posted May 22, 2010 Hi guys, I have been pouring plastics for about 5 years now about twice a week, and in that time have heard the stories of Pyrex / Anchor cups shattering in extreme temperature changes. I even experience this once when I used to pour in my garage in Buffalo NY in the middle of winter, and my hot pyrex touched some cold wet surface and it cracked. But this time was different: Today I was using a newer Anchor heat tempered cup and it shattered. We had actually emptied the cup already and poured the hot plastic into a metal vat, and the cup was just sitting on the counter for a few minutes when it made a loud POP and busted into a million little pieces. The air temp in the shop was upper 60's. And it was sitting on a dry wooden counter. I consider myself lucky that I was not holding the cup of hot plastic when it happened. I am going to get eye protection and heat mits this week. Be safe everybody! Josh K Josh, Wow!!! That was close.Glad you were OK.Did the cup hit anything earlier?I have heard that a even slight bump could cause a failure,at a later point.Wear the protection,and keep the lures rolling.Say Hi to Steve. Quote Link to comment Share on other sites More sharing options...
smallmouthaholic Posted May 23, 2010 Report Share Posted May 23, 2010 I had a full(16oz.)Pyrex cup explode on me 1 year ago. I removed it from the microwave and was stirring the mix @ waist height and observed the glass starting to spiderweb. Then BOOM!!! like a rifle shot it exploded all over the shop and my long pants and shoes. I think I'll try and have some type of tight-fitting cumber bun made w/Velcro fasteners and make some type of wooden Cage(if you will) like they use on split-rim tires. I'm wearing a full face shield when using/handling these potential bombs. A very dangerous hand grenade w/ glass shrapnel for sure when one decides to detonate.. Quote Link to comment Share on other sites More sharing options...
mainbutter Posted May 23, 2010 Report Share Posted May 23, 2010 You know, I always imagined the hot plastic would moderate the glass temperature and keep it cooling down sloooowwwllyyy. I've seen pyrex baking dishes shatter when put under the sink while they were still hot. It's an easy thing to forget about. I hadn't ever really considered the possibility of my pyrex cups shattering on me while full of hot plastic. I'll be taking a few more safety precautions I think. Quote Link to comment Share on other sites More sharing options...
smallmouthaholic Posted May 23, 2010 Report Share Posted May 23, 2010 Some additional, on-line research has indicated we need to be using glass measuring cups made from borosilicate. American Pyrex cups are made from cheap lime soda glass. http://www.containerstore.com/shop/kitchen/foodPrep/measuring?utm_medium=feed&117021=&productId=10000652&utm_source=shoppin You can google Exploding Pyrex Cups and read some alarming stories. Quote Link to comment Share on other sites More sharing options...
mark poulson Posted May 26, 2010 Report Share Posted May 26, 2010 (edited) Thirty eight years ago my wife had a pyrex dish shatter as she took it out of the overn. Both my Mother and her Mother said "It happens. These dishes only have a certain number of heating/cooling cycles in them and then they break". When they both said the same thing, independently, I took it for gospel. I microwave and pour outside, in full clothes with glasses on. I haven't had a dish fail, but that doesn't mean it can't or won't. I pour with a pyrex cup that has never been in a conventional oven. I don't know if that makes a difference, but that's what I know about it. Edited May 26, 2010 by mark poulson Quote Link to comment Share on other sites More sharing options...
