What Quality Tests Should cat eye gel with magnet Pass Before Import?

Migration testing evaluates whether substances can transfer from the cured coating or packaging into a relevant contact medium. The correct protocol depends on the destination market, product classification, packaging configuration, and intended use. A buyer should request the tested sample description, conditioning time, analytical method, detection limits, and laboratory report rather than accepting a generic statement that the product is safe. Testing should distinguish the uncured liquid, cured film, bottle components, brush, cap liner, and magnet packaging where contact or contamination is plausible. The report should also identify the production batch and retained sample so results can be traced to the shipment.

Magnetic performance should be assessed on representative shades using the specified magnet, working distance, exposure time, and curing sequence. Record the appearance and movement of the reflective particle pattern before aging, then repeat the observation after controlled heat, cold, light, and storage conditioning selected for the product and market. Useful acceptance criteria may cover pattern sharpness, response time, settling, clumping, and recovery after shaking. Accelerated aging is comparative evidence, not a direct prediction of every real-world shelf-life condition. Keep the magnet geometry constant because changing its strength, shape, or distance can create an apparent formula failure.

Curing assessment should use the lamp type, wavelength range, power condition, layer thickness, and exposure time stated for the product. Inspect the film for tackiness, wrinkling, shrinkage, softness, odor, loss of gloss, and incomplete adhesion, and compare thin and deliberately heavy application because an acceptable surface does not prove complete cure through the layer. A trained laboratory may add hardness, solvent-resistance, adhesion, and extractable-residue measurements. The supplier's cure instruction should be validated with the buyer's intended lamp rather than copied from a different lamp model. Under-cured coating can affect durability and may increase uncured-material exposure during salon use.

Allergen and restricted-substance screening must follow the destination market's current cosmetic rules and the product's ingredient declaration. Request the complete INCI list, raw-material specifications, safety data where applicable, and batch-linked restricted-substance or impurity reports. Particular attention is needed for acrylate and methacrylate ingredients, pigments, photoinitiators, fragrances, and preservatives because regulatory status and labeling duties vary by jurisdiction. Screening does not replace a compliant label, responsible-person review, or professional-use instructions. Buyers should compare the formula used for testing with the final bulk formula and obtain change-control notification for later raw-material substitutions.

Packaging validation should examine cap fit, brush wiper performance, liner compatibility, bottle strength, decoration adhesion, and fill level. Conduct an agreed leak and orientation protocol on finished, labeled units, including storage in upright, inverted, and side positions where relevant. Transport simulation can add vibration, drops, compression, and temperature cycling selected for the shipping route. Inspect for seepage, cap loosening, cracked glass, label lifting, and magnet movement after conditioning. A container that passes a static warehouse check may still fail in parcel or pallet transport, so the tested bottle, closure, liner, and decoration must match the production configuration.

A useful batch file normally links the purchase order, formula or approved specification, lot number, production date, quantity, release decision, certificate of analysis where issued, ingredient declaration, packaging specification, and retained-sample record. Results should cover agreed physical characteristics such as color, odor, viscosity, density or fill control, curing behavior, and magnetic appearance when those are part of the specification. Customs documentation is not the same as a safety assessment, and a certificate of analysis does not automatically prove destination-market compliance. Buyers should also request the applicable test reports, labeling artwork approval, change-control procedure, and clear identification of the legal manufacturer and importer responsibilities.