Tough and affordable. Or tough and transparent. Different strengths.

PC/ABS (often called Pulse, Cycoloy) combines properties: better impact than ABS (though less than pure PC), better heat than ABS (around 110 °C HDT), better chemical resistance than PC, opaque colors available. Common uses: automotive interior, laptop bodies (Apple MacBook uses PC/ABS), appliance exterior. PC/ABS is typically 30–50% more expensive than ABS but half the cost of pure PC.

PC is prone to environmental stress cracking (ESC) when exposed to certain solvents, oils, or cleaning fluids while under tensile stress. Common offenders: aromatic solvents (benzene, toluene), specific cleaning solutions, brake fluid, some plasticizers. Design considerations: avoid tight bends (stress concentrators), avoid solvent-cemented joints (use ultrasonic welding), match cleaning chemistry to PC compatibility charts.

Yes — PC is commonly used for optical applications where strength matters more than ultimate optical clarity. Safety glasses, headlight lenses, helmet visors. PC has slightly lower optical clarity than acrylic (PMMA) but 10× better impact resistance. For maximum optical clarity with less impact requirement: use acrylic. For impact-critical optical: polycarbonate is the standard.

Yes — ABS accepts paints well, common for consumer products. Standard practice: solvent-wipe to remove oils, light sanding for adhesion, apply primer (often included in first paint coat), then paint. Spray paint or pad print standard for ABS. PC/ABS blends also paint well. Pure PC can be painted but often requires surface preparation for adhesion.

ABS machines easily — soft, cuts cleanly, any standard tooling works. Recommended for small-batch prototype work. PC machines well but prone to stress-induced cracking if clamping pressure is too high or cutting forces excessive. Use sharp tools, light clamping, air coolant (water can cause stress-cracking). For precision PC parts, stress-relief annealing (120 °C for 1–2 hours) before or after machining reduces crack risk.

ABS is 3D-printable via FDM on most consumer/professional 3D printers. Warping is a concern — enclosed chamber preferred. PC is 3D-printable on higher-temperature FDM machines (nozzle 270 °C+). Both benefit from heated bed. For injection-grade mechanical properties, injection molding or CNC machining remains superior to FDM prints. For prototypes, FDM ABS is widely accessible; FDM PC requires specialist printers.