HIPS or High Impact Polystyrene material is not much used in 3D printing, but it does have some interesting properties. It's mostly used as support material for ABS as it bonds wells with ABS and is dissolvable in d'limonene. But besides that, it's also easier to print with than ABS with still a lot of the same properties. In pure form this product is milk-white and prints at 240 degrees.