Why careful cleaning matters
Smoke, spatter and particles from cutting can contaminate optics. Contamination may absorb laser energy and contribute to heat damage. Fingerprints, residue and scratches can also shorten lens life.
Prepare a clean, safe work area
Follow the machine maker’s energy-isolation and service procedure. Disable the laser source, make sure the head is safe to service, and let hot parts cool. If you are not trained to service the cutting head, ask a qualified technician.
Work in a clean, dry, well-lit area. Use powder-free gloves or finger cots. Hold optics by their edges and do not touch coated surfaces. Keep food and drinks away. Use eye protection and adequate ventilation when handling cleaners.
Lower-risk cleaning sequence
Inspect the optic before cleaning. Clean only if contamination is present; unnecessary or overly frequent cleaning can damage sensitive surfaces.
Use a clean bulb blower to remove loose particles. Do not use workshop compressed air, which may carry oil mist or water droplets.
Use only a cleaner and method specifically approved for the exact lens coating and cutting-head model. The source article mentions acetone and diluted vinegar, but these are not universal recommendations. Solvents can be highly flammable and may be incompatible with some coatings or substrates. Do not use them unless the optics maker approves them.
If approved, use a fresh lint-free swab and the specified amount of cleaner. Do not reuse a dirty swab or press hard. For a two-sided optic, use a clean swab for each side. Inspect after every pass and stop when clean.
When to replace the optic
If burned coating, embedded metal, scratches or contamination remain after the approved procedure, stop and replace the optic with the correct part. Do not reinstall a damaged or still-dirty protective window.
Ask PK LASER for help
Send a photo of the lens, cutting-head model and issue before ordering. Ask whether KONTAKT IPA is compatible with the optic coating and follow its product label. Zalo: 0394 552 839; technical support: 0394 542 839.