topofmurrayhill Posted September 17, 2005 Share Posted September 17, 2005 So why is it that you're not supposed to do it? I looked at my jar cover and it has a notch in the seal to prevent a vacuum from being formed. Putting the cover on seems like a good way to cool slower. Realized I don't really understand the rationale behind this rule. Quote Link to comment Share on other sites More sharing options...
RobinInOR Posted September 17, 2005 Share Posted September 17, 2005 I was going to say vacuum, but you got that covered Water condensation from the air maybe? That's why I don't cover my presto before it cools... Quote Link to comment Share on other sites More sharing options...
topofmurrayhill Posted September 17, 2005 Author Share Posted September 17, 2005 Condensation sounds like a promising line of reasoning but I'd guess evaporating FO might be the issue. I have a test jar to pour tonight and am tempted to give it a try, but I'm afraid of screwing up my test. Maybe some other time. Quote Link to comment Share on other sites More sharing options...
jillgunter Posted September 17, 2005 Share Posted September 17, 2005 I just stick a box on top or place them in a box to slow cooling. Ya I would think you may get water in there with top on. Dont know, guess you could just give it a try on one candle. Let us know how it goes if ya do:smiley2: Quote Link to comment Share on other sites More sharing options...
Alan Posted September 17, 2005 Share Posted September 17, 2005 It's vacuum that you want to avoid (as the wax cools and shrinks, as well as the small volume of heated gas above the candle). But, if your lids are notched in such a way to prevent this, then I wouldn't worry about it.A vacuum pressure during cooling can enhance the formation of wet spots and bubbles against the container walls.Cheers,Alan Quote Link to comment Share on other sites More sharing options...
Alan Posted September 17, 2005 Share Posted September 17, 2005 Before you ask where the bubbles would come from, I should add that the vapor pressure of some components in heated fragrance oil can be high enough that, with the vacuum, they enter a gaseous state... hence the bubbles. Quote Link to comment Share on other sites More sharing options...
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