MR. JO Artcast — FS33: Bis-A-free casting for health, regulatory or sensitivity-conscious art
MR. JO Artcast — FS33: Bis-A-free casting for health, regulatory or sensitivity-conscious art
Hook — the studio that wants clean chemistry
An educational studio makes workshops for kids and public demos. They want crystal-clear resin results but prefer to avoid Bisphenol-A based chemistries for health, safety or regulatory reasons.
The problem
Some clients, buyers or certification environments restrict or prefer materials without Bis-A content. Makers also want to limit potential odour or allergenic concerns while still getting a clear, reliable cast.
The solution
MR. JO Artcast-FS33 is the Bis-A-free option — formulated for clear casting where customers prefer or require Bis-A-free systems. It delivers comparable clarity and mechanical properties suited to art casting and smaller pours, while aligning with health or regulatory preferences.

Job-ready workflow
- Prepare molds and inlays as usual. FS33 behaves similarly but always check TDS for any specific pot-life differences.
- Measure & mix: 3:1 by weight — maintain accurate proportions.
- Degassing & pour: apply same bubble-control methods; observe pot-life and batch-size recommendations for FS chemistry.
- Cure & finish: allow recommended cure; sand/polish as needed.
Dos & Don’ts
Do: verify FS33’s compatibility with any finishes or pigments you plan to use.
Don’t: assume all additives behave the same as Bis-A systems — test pigments and dyes first.

Troubleshooting
- Different cure feel: FS chemistries may have slightly different pot-life or exotherm — adapt batch sizes accordingly.
- Pigment compatibility: test small mixes — some pigments need a specific binder performance.
Takeaway: Use FS33 when you must avoid Bis-A but still want high-quality, clear casting performance.

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