Water-Washable Resin

Water-washable resin rinses off with plain water instead of isopropyl alcohol. This greatly simplifies post-processing: no alcohol, less smell, lower cost. Detail is close to standard resin, but it is usually a bit more brittle and still needs UV curing.

What it is good for

• Miniatures and models when you want easier washing
• Home printing without a stock of isopropyl alcohol
• Learning resin printing — less chemistry
• Decor and static models

Where NOT to use it

• Functional loaded parts — usually more brittle than standard
• Items in constant contact with water — they may soften
• Outdoor items under UV
• When you need maximum strength — use ABS-like/tough

How to print

• Normal layer exposure: close to standard resin, dialed in with a test
• Bottom layer exposure: 20–40 s
• Layer height: 0.03–0.05 mm
• Cure wavelength: 405 nm

Washing, curing and storage

The main convenience is water washing. But the wash water cannot go down the drain: it contains dissolved toxic resin.

• Washing: 2–5 minutes in clean water (light agitation helps)
• UV curing: 2–8 minutes — mandatory, or the part stays tacky and weak
• Water disposal: leave the dirty water in sun/UV until the sediment fully cures, then bin the solid residue. Do NOT pour down the drain
• Resin storage: dark, tightly sealed bottle

Pros and cons

• Washes in plain water — no alcohol or smell
• Cheaper post-processing
• Good detail
• Easier for beginners

• Usually more brittle than standard resin
• Finished part dislikes prolonged water contact
• Dirty water cannot go down the drain
• Same liquid-resin toxicity