Fine Scratches on Transparent Parts: How Do We Ensure Undamaged Delivery?

Yes. Acrylic is one of the few plastics that can achieve a mirror finish directly through cutting. We use single-crystal diamond tools for precision machining, followed by flame polishing or diamond grinding. Surface roughness is consistently controlled within Ra0.4μm, delivering a high-gloss appearance free of scratches or defects, resembling a mirror. No secondary coating is required. For batch production, identical parameters are used to ensure consistent mirror finish quality.

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Acrylic is more transparent, reaching up to 92% light transmission; when polished, it resembles optical glass and resists yellowing outdoors. Clear PVC looks similar after polishing but is less expensive and inherently flame-retardant (UL94 V-0), making it suitable for machine windows or protective shields that do not require the highest optical clarity.

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This is typically caused by excessive cutting heat. Acrylic has low thermal conductivity, so slow feed rates, high speeds, or dull tools cause chips to melt and stick to the tool, resulting in haze and stress-induced whitening. Our approach uses monocrystalline diamond tools with high RPM and small depths of cut, along with air cooling or minimal lubrication to dissipate heat. We leave a 0.05-0.1mm finishing allowance before final machining to prevent heat accumulation on already processed surfaces.

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Appearance quality is a core strength. We use a three-stage control process: during machining, sharp tools with high RPM and shallow cuts prevent tool marks and roughness; between processes, all parts are film-wrapped and transferred in individual stations to avoid stacking scratches; before shipping, each piece is inspected under standard light sources against strict criteria for glossy, scratch-free, and blemish-free finishes. Batch consistency is guaranteed by fixed parameters and fixtures, not manual picking.

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Yes, but not all plastics can achieve this. Dense, polishable materials such as acrylic, PC, POM, and PEEK, when processed with diamond tooling and polishing, can consistently reach surface roughness below Ra0.4μm, achieving a high-gloss, mirror-like appearance. Glass or carbon fiber-filled grades, due to exposed fibers, can only achieve a matte or satin finish, which we will clarify in advance.

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