Sndfrddy Posted May 31, 2020 Share Posted May 31, 2020 Hello all. I've been making candles in tins for years. I'm thinking of switching to glass. I remember people talking about how glass candles can crack or explode. Yet most retail candles are in glass? I have always used the safety wick tabs so 1/2 inch wax is left not being able to burn. Is that the issue with glass? Or openings being smaller compared to base (which mine wouldn't). I did see on a site of a very expensive candle that it said not to burn it on glass or marble surface or anything that was colder or the candle would crack. That one was a new one to me as well. Any info or thoughts on this? Is there a much greater risk with glass. Thanks so much for your input! Quote Link to comment Share on other sites More sharing options...
CaptnKush Posted June 1, 2020 Share Posted June 1, 2020 There is always a greater risk when you combine fire with glass. This is why you need to test your candles to make sure you don't have too hot of a wick, and that all your candle jars are made to be used for candles. Try to keep the glass temp at or below 140 degrees. I don't know about the glass or marble surface causing a problem since the bottom of your candle jar isn't going to be hot unless you are still burning your candle with hardly any wax left in jar, maybe someone else on here has experience with that and will chime in. Hope this helps. Quote Link to comment Share on other sites More sharing options...
kandlekrazy Posted June 1, 2020 Share Posted June 1, 2020 I've heard people say that glass explodes or cracks but I personally have never had it happen. IMO if you use a glass made for candles and don't overwick it your chances of it happening are very slim. That being said I watched a clear glass Libbey coffee cup crack as the coffee was poured in and for that reason I stopped reusing glass for candles (Unless it was just for testing). Stress lines can form from high heat and then the glass will crack. Quote Link to comment Share on other sites More sharing options...
Laura C Posted June 1, 2020 Share Posted June 1, 2020 Hi. Sometimes glass containers will be labeled safe for candle use. Per Candles.org, the recommended type of glass container for candles are "Annealed Soda-Lime-Silicate Glass Containers that are Produced for Use as Candle Containers". https://candles.org/industry-standards/ Since we are on the subject, I just noticed that Candles.org has updated the data on their site. They have even better information now and it's more current and specifically explains topics that have been muddy or have needed proper clarification. Such as myths regarding paraffin wax, scented candles, the burning of candles and synthetic FOs vs. essential oils, etc. https://candles.org/ https://candles.org/faqs/ https://candles.org/research-studies/ 2 Quote Link to comment Share on other sites More sharing options...
Sndfrddy Posted June 2, 2020 Author Share Posted June 2, 2020 The vessels I'm thinking of using are specifically for candles. I'll just make sure to do very long marathon burns for testing as well just in case. Thanks guys! Quote Link to comment Share on other sites More sharing options...
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