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Containers for melting M&P

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MrsSpaceship

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I'm getting ready to test some M&P, but I'm trying to dot all my 'i's' and cross my 't's' first. I've done a search on using plastic containers for melting M&P bases and I haven't seen anything beyond don't.

My question is why when they use plastic molds? I have plastic measuring cups that I use for my cp/hp soaping that are category 5 which is safe for hot liquids and chemicals, I won't be letting my base get too hot and it's not caustic, so why is the common consensus don't use it if that's what you have available.

I'm fine if there's a scientific/health related reason for it, I just don't want to go get a bunch of glassware to test out something I may not end up using again based on misinformation that gets continuously passed along in the blogosphere.
 
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galaxyMLP

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I used certain plastics for my MP soap that I melted in the microwave. I cant remember which they were but I'm pretty certain it was PP5 and HDPE.

There is no reason I can think of that you cant use plastic except that it can melt. I had one cheap container melt on me once but, thats also when I learned NOT to put/ remelt a soap w/ metalic glitter in it (microwave + metal = no bueno) Oops!

I think plastic is just fine! Especially The really sturdy ones. You just want to make sure it doesnt soften.

ETA: also remember that you are pouring your finished soap at around 100-120 F but you may get upwards of 170 F while melting it (more if you aren't careful like I sometimes was...:shifty:). Even at 100-120 though, there are plenty of molds that really arent ok for use w/ MP soap. Some can withstand the heat and others cant.
 
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lsg

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I use a Pyrex 3 cup measuring pitcher to melt M&P in the microwave.
 

soapdrool

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I also use the pyrex cup in my microwave. I tried using the plastic cheaper measuring pitchers from the dollar store but they didn't do well and melted.
 

MrsSpaceship

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I'm going to have to invest in more pyrex measuring cups, at least for detailed multi pours.
I tried using my plastic cups, to pour a bunch of embeds. I didn't have too much of a problem melting the body of the M&P, the issues I noticed was when I poured and the soap clung to the the edge and cooled very quickly, creating a soap dam of sorts which inhibited further pouring. Not good when you're trying to fill a bunch of small molds.
 

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