HIPS is similar to ABS in its properties, but soluble. Citrus based solvents such as limonene do not affect materials such as ABS, so HIPS is often used as a support material. High volume users will remove HIPS supports with limonene (or similar) solution in an ultrasonic tank, but the ultrasonic method is not needed as long as you have a bit more time. HIPS is easier to print than ABS, and is a bit more flexible. It prints at similar settings to ABS, and bonds well to it.