Food grade pickling lime is what you want. Mrs. Wages Pickling Lime works wonderfully (pure calcium hydroxide)! Found in canning sections of stores usually (this is in the US though so I guess it depends on where you are. However, you can find it on amazon for pretty cheap). The lime is more suited for dry teks like Q21's vs lye for wet teks such as Cyb's teks.
I'm sure it could be achieved one way or another, but I have not attempted it. Edit: It would turn into a typical wet tek though. Also, Q21 points out that it will not work with lye in the WIKI.
Mrs. Wages Pickling Lime16oz for $8.59 isn't too bad of a price. I do 100g extractions at a time typically so that lasts me a while.
New to The Nexus? Check These Out:
One Fish Two Fish Red Fish Blue Fish