Surface Finishing & Treatment

Vapor polishing creates optically clear, defect-free surfaces on transparent and translucent plastics by briefly exposing machined parts to solvent vapor that smooths surface irregularities at the molecular level. The controlled vapor environment softens the outermost material layer just enough to allow surface tension to eliminate machining marks, tool chatter, and microscopic scratches without affecting dimensional accuracy.

Key Advantages

• Transforms cloudy, machined surfaces into glass-like clarity comparable to molded optical components
• Preserves tight tolerances—unlike mechanical polishing, no material removal or dimensional changes occur
• Works on complex geometries including internal bores, threaded features, and intricate contours difficult to mechanically polish

Why It Matters

• Prevents dimensional changes during service or thermal exposure
• Eliminates stress cracking in precision components
• Reduces warpage in thin-wall or complex geometries
• Optimizes long-term dimensional consistency

Ideal Candidates for Stress Relieving

• Precision components operating in demanding thermal environments
• Parts with tight tolerances requiring long-term dimensional stability
• Thin-wall or complex geometries more susceptible to warpage
• High-performance materials like PEEK, PEI, and imidized polymers
• Parts machined from thick stock where material removal creates significant stress redistribution

Flame polishing applies brief, controlled flame exposure to plastic surfaces, melting the outermost layer to create smooth, glossy finishes on edges and flat surfaces. This technique proves effective for acrylic, polycarbonate, and other thermoplastics where a high-gloss appearance is desired without optical clarity requirements. The process works well on edges, chamfers, and accessible surfaces but cannot reach internal features or complex geometries.

Flame polishing requires careful control to prevent overheating that would cause bubbling, discoloration, or dimensional distortion. Our experience with material-specific flame polishing parameters ensures consistent results without compromising dimensional accuracy on adjacent precision features.