Understanding Silicones: The uses of silicon in FX; Tin vs Platinum; Behaviours and Applications.
First point, for anyone who isnt sure, Silicone, the synthetic polymer, is correctly spelt with an ‘e’ on the end, to distinguish it from the metalloid element, Silicon. Technically, it is a misnomer anyway, that dates from their discovery in 1942, it was thought the structure of the compounds was similar to ketones, when they are in fact Siloxanes. However the name Silicone has become accepted and persists to this day.
Right, that’s out of the way, now to business…..
What is Silicone?
Here is the Wikipedia definition: http://en.wikipedia.org/wiki/Silicone
The Encyclopaedia Brittanica explanation: http://www.britannica.com/EBchecked/topic/544410/silicone
and for the real chemistry nuts, Dow Cornings spiel: http://www.dowcorning.com/content/discover/discoverchem/properties.aspx
Does any of that help? Well, maybe, but it wont necessarily help you make that mould/art piece/prosthetic or the like….
Basically, silicone, for our purposes, is a synthetic polymer, which sets, or vulcanizes, at room temperature, into a rubbery material. This is known as RTV Silcone. It comes in hard and soft formulations, is inert once cured, heat resistant, flexible (even in hard kinds) and very very useful! RTV silicone rubber is used in the movie, entertainment and special effects industry, and in theme parks. Soft “skin” silicone rubbers, used by make-up and Fx artists, were developed specifically for sfx makeup artists, and certain kinds are also used in the medical prosthetics industry. It is also used, in an uncured form, as a lubricant, which will be apparent to anyone who has ever spilt uncured silicone on their floor…. it is an immediate shortcut to the kind of slide action Tom Cruise was famous for in ‘Risky Business’…..
So how do you know what kind of silicone to use? That depends on what you are using it for…. First I will go through some basic information that everyone should know before they start. Continue reading