HIPS and Limonene Dissolvable Supports for ABS 3D Printing: When PVA Isn't the Right Pairing

This site's guide to the Anycubic ACE Pro covers PVA soluble supports in depth, and PVA is genuinely the right default for most dual-material setups — it's water-soluble, low-odor, and pairs naturally with PLA. But PVA has a real weakness that doesn't get talked about enough: it's hygroscopic to the point of being difficult to store, it doesn't bond reliably to ABS or ASA (PVA is formulated to pair with PLA's printing temperature and chemistry), and it degrades in a heated enclosure. For ABS and ASA prints specifically — the materials people reach for precisely because they want heat resistance and outdoor durability — HIPS dissolved in d-limonene is the pairing that's been standard since long before PVA soluble supports existed, and it's still the better choice whenever ABS is the primary material.

Why HIPS and ABS Pair Well

HIPS (High Impact Polystyrene) prints at a similar temperature range to ABS, shares comparable shrinkage behavior, and — critically — does not bond to ABS the way PVA doesn't bond well to it either. That non-adhesion is exactly what you want in a support material: HIPS supports print happily against ABS without fusing solidly to it, so the two structures separate cleanly once the limonene dissolves the HIPS away. The combination also plays well thermally: both materials want a heated bed and tolerate (ABS actively needs) an enclosure, unlike PVA which can absorb enough ambient humidity in a heated chamber to degrade mid-print.

PVA + PLAHIPS + ABS/ASA Dissolves inPlain waterd-Limonene (citrus solvent) Dissolve timeHours, faster with warm water and agitationSeveral hours to overnight depending on part geometry; limonene works faster warm Storage sensitivityHigh — absorbs moisture quickly, degrades and clogs if left outLow — HIPS is far less moisture-sensitive than PVA Print temperature matchMatches PLA (~190-220°C)Matches ABS/ASA (~230-250°C) Odor/fumesMinimalHIPS printing has its own VOC profile similar to ABS; the limonene dissolving step has a strong citrus smell and is a VOC source of its own

Printing the Combination

1. This requires a dual-extrusion printer (IDEX or a toolchanger covered elsewhere on this site) — HIPS supports under single-nozzle multi-material systems like an AMS or ACE Pro work less reliably since those systems are tuned around PLA-family soluble workflows
2. Print HIPS supports at a slightly lower temperature than your ABS, around 220-230°C, with a small air gap or interface layer setting if your slicer supports one — this makes initial contact just strong enough to hold geometry during printing without over-bonding
3. Both materials benefit from an enclosure; ABS especially needs one to avoid warping and layer separation, and HIPS tolerates the same heated chamber conditions without the moisture problems PVA would have
4. Design support interfaces the same way you would for any soluble support workflow — dense enough to hold overhangs, but not so solid that it takes forever to dissolve

Dissolving

d-Limonene is sold as a citrus-based solvent (it's the compound responsible for orange peel smell, extracted and concentrated) specifically marketed for this use, though technical/industrial-grade limonene from cleaning-product suppliers works identically and is usually cheaper. Submerge the printed part in a sealed container of limonene, give it several hours to overnight depending on how much support material and how deep internal channels are, and agitate occasionally to speed things along — a cheap ultrasonic cleaner (the kind already covered on this site for jewelry and small parts) meaningfully speeds up the process for small prints.

Safety

d-Limonene is a combustible liquid with a flash point low enough to take seriously — keep it away from open flame, sparks, and anything that gets hot (never near a heat gun, soldering station, or a laser cutter's work area). It's also a strong degreaser and skin irritant with repeated contact, and a genuine solvent for a wide range of plastics beyond HIPS, so use nitrile gloves and don't store it in anything but its original or a clearly-labeled solvent-rated container — it will craze or dissolve many plastic storage containers not rated for solvent use. Work in a ventilated area; the citrus smell is pleasant but is still a VOC exposure, and a sealed container with a loose-fitting lid for gas exchange (rather than fully airtight, which risks pressure buildup from off-gassing) in a garage or shop with active air movement is the right setup. Dispose of spent, HIPS-saturated limonene as you would any solvent waste — check local hazardous waste disposal rules rather than pouring it down a drain.

For anyone printing ABS or ASA regularly and still fighting support removal with pliers and a heat gun, this is a genuinely underused upgrade — the dissolve-away convenience of PVA supports, without PVA's storage headaches, matched to the exact material that most needs good support removal in the first place.