From what I understood, the requests and blessings should be written on a piece of sheep's skin that is not slaughtered for the purpose of using part or all of it in Ritual, and then burnt in one of the candles. However, at this particular time of the year I may have the chance to obtain this most Magical tool.
But, to write on it and then burn it, I'd lose it forever, and I assume burning it would produce unpleasent smell. What is the perfect size, and do I get to keep it and use it for various Rituals? That would be more practical for me, and cool, too.