how much to use

It is actually quite easy. First let me say I know nothing about about iso applications. For topicals I use coconut oil, but to each their own. Ordinarily salves would need less potency than edibles. I would imagine figuring potency would be the same for the iso and the rum as well as oils and other items. The way I determine potency is by dividing the amount of solvent into the quantity of marijuana used. For example, if you have an ounce of weed-28g-and want to make 10oz of tincture, you divide that 28g by 10 and you get a potency of 2.8g per fluid oz. For your candy you'll want it as concentrated as possible because you only use a small amount. For my topicals, I use 1/3 strength and it works great.

I think those rum candies are going to be delicious.

 

Yes, 10fl oz after evaporation. That was just an easy example to illustrate how to determine your potency.

The reason for evaporating by half is to increase the potency. It's weak without doing that. Nearly every alcohol tincture recipe I've seen includes the 50% reduction.

With your candy, though, you'll need it even stronger because it doesn't hold as much. For that, you just reduce it further.

 

BKS says you don't add the tincture until the very end to avoid the long heat, but I don't know where that is in her thread. What I'm going to try with my tincture soon is to make some filled cream chocolates. That rum tinc would be great for that, I bet.