regardless of what product it is, i label all ingredients.
regarding melt and pour, there are very different formulations out there. there are some based on mostly naturally derived ingredients. others are mostly detergents and chemicals. as a consumer i want to know what i'm getting. will buy the former but not the latter, and won't even consider those without listed ingredients.
i'm struggling with reed diffusers because the bases are proprietary formulas and i don't know what's in them -- only sometimes what's NOT in them. may give up on that idea anyway...
ultramarines will suffice in your listing, you do not need to specify the color.
as an aside, there's the debate about using inci listings vs. plain english listings. when the inci is very short and self-explanatory i use them. otherwise i don't, do not want to have to whip out my dictionary when i'm looking at a label. and just too much info on a label, imho.
when in doubt i do look it up. e.g. when i first started out i mistakenly thought cosmetic micas were natural ingredients. real, mined micas are natural -- also full of lead, selenium and other heavy metals = natural but NOT safe. cosmetic micas are recreated in the lab, and are not natural, but are GRAS. google is a wonderful thing when trying to navigate the complex landscape of ingredients.
sorry to hijack the thread!