| Application Compatibility | Compatible laser wavelength, film structure, coating type, and target substrate | The film should be tested with the actual laser source, including wavelength, power, speed, focus, and pulse settings. | Technical data sheet, application test report, and production sample made with the buyer’s laser parameters | 20% |
| Film Thickness Control | Nominal thickness and measured thickness variation across the roll | The supplier should define a written thickness tolerance and provide measurement results from different roll positions. | Thickness specification, calibrated gauge records, and cross-web inspection data | 10% |
| Optical Performance | Transmittance, haze, reflectivity, contrast, and visual uniformity | Acceptance limits must be matched to the application; optical values should be measured using consistent test methods. | Optical test report, sample inspection under standard lighting, and agreed acceptance samples | 12% |
| Laser Marking Quality | Marking contrast, edge sharpness, readability, residue, distortion, and repeatability | A qualified supplier should demonstrate stable results over repeated runs and across the usable roll width. | Repeated marking samples, microscope images where appropriate, and process-window test results | 15% |
| Mechanical Properties | Tensile strength, elongation, tear resistance, dimensional stability, and winding quality | Values should remain suitable for converting, laminating, feeding, and end-use handling at the specified temperature range. | Mechanical test report, roll inspection record, and converting-line trial results | 10% |
| Adhesion and Surface Treatment | Coating adhesion, surface energy, adhesive compatibility, and resistance to delamination | The film should maintain adhesion after the intended processing, storage, temperature, and humidity exposure. | Peel or adhesion test results, surface-treatment details, and aging-test samples | 8% |
| Environmental and Chemical Compliance | Restricted substances, heavy metals, chemical composition, and environmental declarations | For international supply, verify applicable RoHS, REACH, packaging, and destination-market requirements. | Current compliance declarations, third-party laboratory reports, and material safety documentation | 8% |
| Quality Management | Incoming inspection, in-process controls, final inspection, traceability, and corrective actions | A documented quality system, preferably supported by a valid ISO 9001 certificate and batch-level traceability. | Quality certificate, inspection plan, certificate of analysis, and sample corrective-action report | 7% |
| Production Capacity and Lead Time | Monthly capacity, minimum order quantity, standard lead time, and emergency capacity | Capacity claims should be supported by production records and should cover both trial orders and repeat orders. | Capacity statement, production schedule, order history summary, and agreed delivery terms | 5% |
| Technical Support and Customization | Sampling speed, formulation support, coating adjustment, packaging options, and engineering response time | The supplier should provide a clear sampling process and documented response procedures for technical issues. | Sample-development plan, engineering contact details, and response-time records | 3% |
| Commercial Value | Total landed cost, yield, waste rate, packaging, shipping, payment terms, and warranty support | Compare cost per usable square meter or finished unit rather than purchase price alone. | Formal quotation, packaging specification, defect policy, and total-cost calculation | 2% |