Because there are still concerns about the safety of glass, I took it upon myself to test a SSA glass toy in ways that exceeded the design specifications for shock and thermal stress.
First, the shock test. For this test I took the toy up on the roof of a one story house and dropped it onto the concrete pad below. No chips, no cracks, no breakage.
For the second test I heated the toy up to 300F in the oven (note - this is a very unsafe temperature! Do not use toys that are heated up over about 105F). After it was heated I plunged it into a bowl of ice water. No change, no cracks.
Conclusion: tempered borosilicate is tough stuff. If you have a toy from a reputable manufacturer you don't need to worry.
First, the shock test. For this test I took the toy up on the roof of a one story house and dropped it onto the concrete pad below. No chips, no cracks, no breakage.
For the second test I heated the toy up to 300F in the oven (note - this is a very unsafe temperature! Do not use toys that are heated up over about 105F). After it was heated I plunged it into a bowl of ice water. No change, no cracks.
Conclusion: tempered borosilicate is tough stuff. If you have a toy from a reputable manufacturer you don't need to worry.
