If you’re diving into the world of resin 3D printing, choosing the right type of resin is one of the first critical decisions.
Two popular options dominate the market: Standard UV resin and Water Washable resin.
Each has its strengths and trade-offs. Your choice will impact print quality, ease of post-processing, safety, cost, and durability.
In this guide, you’ll learn everything you need to know about UV resin vs Water Washable resin—so you can confidently pick the best material for your next project.
What Is Standard UV Resin?
Standard UV resin is the traditional material used in SLA (stereolithography) and MSLA (masked stereolithography) printers.
Key Features:
- Cures under 405nm UV light
- Requires isopropyl alcohol (IPA) or special cleaners for washing
- Wide range of available types (standard, tough, flexible, high-detail, etc.)
Common Uses:
- Miniatures
- Prototypes
- Functional parts (depending on resin type)
What Is Water Washable Resin?
Water Washable resin is a newer formulation that allows uncured resin to be cleaned off parts with plain water—no harsh solvents needed.
Key Features:
- Also cures under 405nm UV light
- Post-processing uses water instead of IPA
- Often marketed as safer and more beginner-friendly
Common Uses:
- Miniatures
- Hobbyist projects
- Display models
UV Resin vs Water Washable Resin: Full Comparison
| Feature | Standard UV Resin | Water Washable Resin |
|---|---|---|
| Cleaning | Requires IPA or cleaning solutions | Rinses with water |
| Toughness | Generally stronger | More brittle (for most brands) |
| Surface Finish | Smooth and sharp | Slightly chalkier surface after curing |
| Print Accuracy | Very high | High, but may vary slightly |
| Shelf Life | Long (if stored properly) | Slightly shorter, can absorb moisture |
| Environmental Impact | Needs chemical disposal | Easier but still not truly eco-friendly |
| Safety | Requires gloves, ventilation | Still needs protection, but less harsh fumes |
| Cost | Slightly cheaper on average | Slightly more expensive per liter |
| Durability Outdoors | Moderate (unless UV-resistant types) | Moderate to poor (can absorb water over time) |
Pros and Cons of Standard UV Resin
✅ Pros:
- Tougher and more flexible types available
- Highest range of specialty resins (engineering, dental, flexible, tough)
- Excellent surface quality and fine detail
- Lower material cost (per liter)
❌ Cons:
- Requires handling and disposal of chemicals (IPA, solvents)
- Strong odor and fumes (needs good ventilation)
- Longer, messier cleanup process
Pros and Cons of Water Washable Resin
✅ Pros:
- Easier and faster to clean
- No need to stock large amounts of IPA
- Slightly safer for small workshop environments
- Beginner-friendly
❌ Cons:
- More brittle and easier to crack if dropped
- Still toxic (not safe for drinking water disposal)
- Surface finish can be slightly chalky if not post-cured properly
- Sensitive to humidity and moisture absorption
Best Situations to Choose Each Resin
| Scenario | Best Choice | Why |
|---|---|---|
| Printing highly detailed miniatures | Standard UV Resin | Best sharpness and surface finish |
| First-time resin printer users | Water Washable Resin | Easier cleanup, simpler learning curve |
| Tough mechanical prototypes | Standard UV Resin | Available tough/durable formulations |
| Indoor display models | Water Washable Resin | Easy and safe for hobbyists |
| Hot or humid environments | Standard UV Resin | Water washable can absorb moisture over time |
| High-volume professional printing | Standard UV Resin | Consistent strength and lower running costs |
Tips for Success With Both Resin Types
- Always wear gloves and safety glasses during handling.
- Cure parts completely (use UV curing station or strong UV light).
- Store resin in a dark, cool place to prevent premature curing.
- For water washable resins, change rinse water often to prevent sticky residue on prints.
- Dispose of used resin and contaminated water or IPA responsibly—never pour uncured resin down the drain.
Popular Brands to Consider
| Brand | Resin Type | Notes |
|---|---|---|
| Elegoo Standard Resin | UV Resin | Affordable, great all-rounder |
| Anycubic Plant-Based Resin | UV Resin (eco-type) | Less odor, beginner friendly |
| Elegoo Water Washable Resin | Water Washable | High quality, widely available |
| Anycubic Water Washable Resin+ | Water Washable | Improved toughness version |
FAQs
Q1: Is water washable resin safe to pour down the drain?
No. Even though it rinses with water, water washable resin is still toxic when uncured. Collect rinse water and cure it under UV light before disposal.
Q2: Does water washable resin affect print quality?
For casual prints and display models, no significant difference.
For ultra-fine miniatures or engineering models, standard resin still offers sharper, crisper results.
Q3: Is water washable resin more eco-friendly?
Slightly, because you avoid chemical solvents, but the resin itself is still not biodegradable or non-toxic.
Q4: Can I mix water washable resin with standard resin?
No. Different chemical formulations mean they are not safely compatible for mixing.
Conclusion
Choosing between Standard UV Resin and Water Washable Resin depends on your priorities:
- If you value stronger parts, maximum detail, and lower material costs, stick with Standard UV Resin.
- If you want easy cleanup, a safer setup, and convenience, Water Washable Resin is an excellent choice—especially for beginners and hobbyists.
Whichever you pick, remember that proper safety practices, good ventilation, and correct post-curing are essential for getting the best results and protecting yourself during resin printing.