[member="Cain Laatl"] The problem with Alchemy, and I say this as a tech judge, is that it's powerful, and it's seen as an easy way to get around the dev thread requirements for saber resistance. And so, knights, and even apprentices, start to make items that would require a well-written sub from Masters. Needless to say, it's a little annoying.
In Canon, alchemy was rare, an art know by few and seldom used. It (seriously) led to the creation of the Sith, as the Jedi who discovered it we're exiled, and found Korriban, where Sorizus Syn combined her knowledge with that of the Sith people there to create the Sith Alchemy we know and love today.
What is it you want? If you just want an alchemical token or helmet of whatnot, talk to some of the Masters of it on the boards. Try and get them to make it for you. But please don't just make an alchemist for the sake of alchemy.
EDIT: What kind of things should the mask do?