HIPS is a High Impact Polystyrene HIPS used as support materialPricerange: $40.00 (per 1 Kilo) https://www.filaco.com/shop/abs-1-8mm-sapphire-blue-0-5kg-reel-copy-3/   HIPS can be dissolved in a fluid called D-Limonene Make sure that you know what you start with: D-Limonene is biodegradable, but due to its low flash point, it must be treated as hazardous waste for disposal.  http://www.makershop.fr/produit/flacon-d-limonene-1l/ This might be a suitable alternative, though it's not been tested. http://flexisolv.com/en/microemulsions/d-limonene-alternative.html?WT.srch=1&WT.mc_id=9330&gclid=CNHjjN2mmb0CFUsUwwodHbMA-w |   |