| Ink System and Substrate Compatibility | 20% | Ink type, compatible substrates, recommended mesh range, coating requirements, and known limitations. | The supplier should provide written compatibility guidance for the intended substrate, such as cotton, polyester, nylon, paper, coated metal, glass, or plastic. Compatibility should be confirmed with a production-simulated sample. | Reduces adhesion failures, bleeding, cracking, and substrate distortion. | 1–5 |
| Color Strength and Consistency | 15% | Color standard, pigment concentration, batch-to-batch tolerance, mixing instructions, and color-matching process. | Request a wet drawdown or printed proof against an approved color reference. Compare multiple production batches under consistent lighting and viewing conditions. | Stable color reduces rework and improves repeat-order consistency. | 1–5 |
| Viscosity and Printability | 15% | Viscosity range, rheology profile, recommended squeegee hardness, mesh count, and print speed. | Use the supplier's stated test method and measure samples at a controlled temperature. Evaluate flow, edge definition, coverage, fibrillation, and screen stability during a representative print run. | Appropriate rheology supports clean detail, uniform deposits, and reliable press performance. | 1–5 |
| Curing or Drying Performance | 15% | Required temperature or drying conditions, dwell time, film thickness, equipment settings, and cure verification method. | For heat-cured systems, verify the recommended cure window using the actual dryer and substrate. For air-dry or UV systems, confirm drying time and complete film formation before testing. | Insufficient curing can cause poor wash durability, blocking, smearing, or transfer. | 1–5 |
| Adhesion and Durability | 15% | Wash-care data, abrasion resistance, flex-crack resistance, adhesion results, and recommended test conditions. | Use a substrate-appropriate method. Common checks include cross-hatch adhesion for rigid surfaces, repeated laundering for textiles, and abrasion or flex testing where applicable. Compare results with the product specification. | Confirms that the printed image remains functional and attractive during use. | 1–5 |
| Technical Documentation and Traceability | 10% | Technical data sheet, safety data sheet, certificate of analysis, shelf life, lot number, storage conditions, and revision date. | Documentation should be current, consistent, and available before purchase. Each delivered container should be traceable to a production lot and include clear storage and handling instructions. | Supports quality control, worker safety, audits, and faster troubleshooting. | 1–5 |
| Regulatory and Environmental Requirements | 5% | Restricted-substance declarations, applicable chemical compliance information, VOC data where relevant, and wastewater or disposal guidance. | Request documentation that matches the destination market and final application. Do not rely only on marketing claims; verify the specific product and production lot requirements. | Helps prevent compliance risks and supports responsible production decisions. | 1–5 |
| Sampling, Lead Time, and Supply Reliability | 5% | Sample availability, minimum order quantity, standard lead time, safety-stock options, packaging sizes, and delivery history. | Run a sample trial before approval and review delivery performance over several orders. Confirm whether the same formulation and color references can be maintained over time. | Reliable supply protects production schedules and reduces qualification costs. | 1–5 |
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