Transparent.
Virtually unbreakable.
Optical grade.

Base PC is actually softer than acrylic and scratches more easily. For scratch-critical applications (touchscreen covers, instrument windows), specify hardcoated PC — a thin silica-based coating that raises surface hardness to approach glass. Pencil hardness improves from 2H (uncoated) to 8H (hardcoated).

Standard PC yellows slightly under prolonged UV exposure — visible after 2–3 years outdoors. UV-stabilized grades resist yellowing for 10+ years outdoors. For applications where color stability matters, specify UV-stabilized PC or add a UV-protective topcoat.

Acrylic for: better optical clarity (92% vs 89%), scratch resistance, lower cost (~1/2 PC), dimensional stability. PC for: impact resistance (50× higher), higher temperature service, formability, ballistic rating. Rule of thumb: acrylic for visibility where impact isn't the driver; PC where it could be struck, dropped, or subjected to thermal load.

Yes — PC survives 134 °C steam autoclave cycles. Higher-purity medical-grade PC (like Makrolon Rx series) is specifically designed for repeated autoclave cycles without embrittlement or yellowing. Standard PC may yellow after 100+ cycles; medical grades are qualified to 500+ cycles.

Yes, with proper technique. Key rules: use sharp tools (PC galls with dull tools), moderate speeds (not too slow — avoid heating), air cooling or light mist (not flood coolant — water absorption causes stress), avoid climb-milling thin sections. For thick sections, occasional annealing stress-relief may be needed to prevent stress cracking.