Can you use glassware as moulds?

[Rah]

Hi, I was wondering if you can use things made of glass as moulds?
I found these cute little dishes which I think would make great soap moulds.

For those of you who live in the UK (and perhaps other places, I dunno if you can get these anywhere else) there's these puddings called Gü (the chocolate ones) and Frü (the fruity ones.)
If you get the cheesecake versions of each, they come in these little dishes like this (best picture I could find):

In case it's difficult to see, they are not completely round, they are kind of like polygonal.
So yeah, can I use these as soap moulds if I grease them enough? I have aquired a small collection of them, just in case Either way, I'm sure I'll find a use for them!

Thanks!
Rah

 

[reallyrita]

hmmmm...I am wondering how you would get the soap out of the mould?

 

[Lindy]

Oh yeah - I use a glass Bundt Cake dish and it works just great. I spray it with cooking oil so the soap comes out though....

 

[topcat]

I was wondering that myself Rah.....so Lindy - wouldn't the cooking oil spray just saponify? Obviously it doesn't, as you use it successfully - but I am wondering how that works?

Tanya

 

[Etelka]

I've tried the spray once and it stuck, I would line it with butcher's paper at least or wax paper
Etelka

 

[Lindy]

Tanya - I don't know why it works, but it does. It is only rarely that I have trouble getting my soaps to unmold and this will be the third time I've used my glass Bundt Cake pan....

 

[topcat]

Okay, I will try it soon and see how I go. My cooking oil spray is Canola....wish me luck!

Tanya

 

[Rah]

Looks like I'll have to get some cooking spray!

Although when I made soap before I greased my mould with some leftover tallow from my mixture (as though I were baking a cake!) and it popped out fine. I was using a plastic mould... it was very rigid though and I did have to shake the soap out a little, hahaha.

Thanks!

 

[Lindy]

Rah - what you've been doing is the same idea as cooking spray - carry on with what has been working for you...

 

[Lindy]

Just because I said it really does work - my soap won't come out of my Bundt Cake glass pan - so I'm going to let it sit for a couple of more days (it hasn't finished setting up).....sheesh!!

 

[gemini]

I use tuna cans and I take a little olive oil and rub it around in the tin then I pour the soap in. I put mine in the freezer and if it wont shake out then I set it in a little hot water to loosen the bottom. It will usually pop right out.

 

[xyxoxy]

I have not used glass but I coat the inside of my PVC molds with petroleum jelly (vaseline) which does not saponify. Only once was it difficult to get the soap out and I used the freezer --> Hot water trick which worked great.

 

[Lindy]

Tuna cans are fine for M&P or rebatching but not for CP - they lye and aluminum react rather violently together......think of a volcano....

 

[topcat]

I have not used glass but I coat the inside of my PVC molds with petroleum jelly (vaseline) which does not saponify. Only once was it difficult to get the soap out and I used the freezer --> Hot water trick which worked great.

Mickey, does the vaseline seem to coat the soap and look greasy/shiny at all after unmoulding? Can you wipe it off easily? TIA.

Tanya

 

[gemini]

not to be a nudge or anything but if you are in anyway aiming for a chemical free product, vaseline is made with ppppppetroleum products. I think they do make a nonpetroleum jelly too.................
Sorry to be a pain. ;(

 

[xyxoxy]

Mickey, does the vaseline seem to coat the soap and look greasy/shiny at all after unmoulding? Can you wipe it off easily? TIA.

Tanya

I put a little dab on a paper towel and use that to wipe the inside of my molds in a very thin coating. I don't really notice it on the unmolded soap though I suppose it must be there to a small degree. I think most of it stays in the mold.

In the end I almost always end up "washing" my soaps anyway because I like the softer edges and the shiny finish that offers.

I know it's petroleum based but it's not actually an ingredient in the soap and I don't think any residue remains on the finished product. At least none that I notice. I suppose if I were to sell them I would have to disclose that fact or find another more natural unsaponifiable lubricant.