Soon to be pouring..but what about glitter?

I am getting ready to order some equipment to begin injection molding and glitter came up. What size do I use for grubs and how do you guys choose colors of glitter? I plan on pouring mostly black and some green pumpkin. Do the containers give info about how much color or glitter to add?

No they really dont but if you check out sites like bearsbaits and delmart they have reciepe books that kinda give you a starting idea rest is by taste. I add about 1/4 teaspoon to 4 oz of plastic for my glitter and I use the .045 size

JJ