[quote=@Grif of Hearts]
I imagine sigillum has some limits, although considering the specifics of vocum/motem are similarly vague I don't suppose it matters a great deal. I don't think it's ever been mentioned what kinds of movements were necessary to produce specific alchemy with motem, for example. Mind you, this did give me an idea for a character; an alchemist who manipulates ink/colour, and uses motem alchemy to create larger, more powerful symbols out of ink/colour to work for sigillum alchemy. :D
[/quote]

Interesting....very interesting...he/she can only be a heavily tattooed alchemist whose powers rely on that.