I am selling 2oz bags of "Bright White" ABS colorant. This was manufactured by Masterbatch, a division of Clariant. It is not homemade nor is it a cheap imitation.
The typical usage is 1-3% depending on desired color and the material being colored.
I have tested this with Sabic Cycolac MG47 and MG94.
The cost is $6/per bag and this includes shipping to the continental United States.
PayPal preferred. Please let me know if you have any questions. Thanks.