Ok I was in local supermarket and noticed these flexible cake/loaf molds when bing the light bulb appears over head with a question mark.
So Iam near to cropping and will have trim and we all like to do extractions bubble/dry sift and solvent, and what a pain the scraping is.
Question is this silicon stuff inert to alcohol / butane?
As extracting into one of these then evapourating off the sovent and then freezin the mold, upon taking out of the freezer and flexing the mold/turning it inside out all the residue would be solid and in effect flake off the container and be easier to gather up into a single lump/ball.
so what do you oilers think worth a punt or is it like ice skating uphill

It's silicone, not silicon. Silicon is a naturally found mineral, silicone is a man made polymer or rubber, containing silicon. Most solvents probably wouldn't dissolve the silicone but you'd need to do some research into which solvents are ok. If you don't want the oil to stick, you can use teflon. You can buy non stick cooking matts, made of teflon, in the supermarket. Just line a pan with it, pour in the oil/solvent, purge, freeze and remove.

Toluene is a hydrocarbon, which degrades silicone. Butane is a hydrocarbon also so I certainly wouldn't recommend using that on silicone.

http://cool.conservation-us.org/coolaic/ja...c22-02-007.html

Cheers gunna you some kind of chemist sorry about the spelling it was just a quick glance at the label

It's a common and easily made mistake, I just thought I'd clue you in.

I would think twice before using alcohol on silicone also.

http://docs.google.com/gview?a=v&q=cac...gQ9ixUKiNr6AxgA

This is why teflon (PTFE) is okay to use, groovelick.


PTFE Resistance:

Excellent resistance (no attack) to Dilute and Concentrated Acids, Alcohols, Aldehydes, Bases, Esters, Aliphatic, Aromatic and Halogenated Hydrocarbons, ketones, Mineral Oils, Vegetable Oils and Oxidizing Agents. PTFE is virtually impervious to chemical attack.

PTFE Quick Facts:

* Maximum Temperature: 572°F 300°C
* Minimum Temperature: 392°F -200°C
* Autoclavable: Yes
* Melting Point: 626°F 330°C
* Tensile Strength: 6,240 psi
* Hardness: R58
* UV Resistance: Excellent

Sainsbury's
Tefal Teflon Non Stick Cooking Mat
£2.92/unit

These type of non stick mats are made with PFA, which is closely related to PTFE and has the same level of chemical resistance as PTFE. Compare in the charts below. The only two products listed that are resistant to everything are PTFE and PFA. You can also get PTFA Toastabags on ebay. Once you've purged the solvent, just place the mat or bag in the freezer and when the oil turns hard and brittle you can crack it with your fingers and peel it away.

http://www.indianlabware.com/img/Prop%20of%20Plastic.pdf

whoa gunna that is a lot of good info be looking into those cheers

My work is done here. Thou shalt arise from thine knees and go forth to make the sacred oil.

I shall use it just for the anointed choosen few

excellent info gunna, will have to try the teflon mat and freeze method next time - its always a pain scraping the oil