| Ink Quality | Color consistency | Color difference of ΔE00 ≤ 2.0 between approved batches | Print a controlled drawdown and measure with a calibrated spectrophotometer under the same illuminant and geometry. | Consistent color reduces rework, shade disputes, and visual variation across repeat orders. | High |
| Ink Quality | Viscosity stability | Variation within ±10% at the agreed test temperature and shear rate | Measure using the same rotational viscometer, spindle, speed, temperature, and conditioning time. | Stable rheology supports predictable deposit, edge definition, mesh release, and press performance. | High |
| Ink Quality | Pigment dispersion | No visible agglomerates; grind gauge result appropriate to the mesh and print design | Inspect a drawdown under magnification and use a fineness-of-grind gauge where applicable. | Good dispersion lowers the risk of pinholes, uneven color, mesh blockage, and rough printed surfaces. | High |
| Substrate Compatibility | Adhesion to intended substrate | No significant lifting or flaking after cross-hatch and tape testing | Condition printed samples, perform a cross-hatch cut, apply standardized pressure-sensitive tape, and record coating removal. | Adhesion depends on the ink chemistry, substrate surface energy, pretreatment, and curing conditions. | High |
| Substrate Compatibility | Material coverage | Uniform coverage at the approved deposit and screen-mesh specification | Compare solid prints at a defined mesh count, squeegee hardness, print speed, and wet-film deposit. | Coverage affects opacity, color strength, hand feel, ink consumption, and the number of print strokes. | High |
| Technical Performance | Curing or drying window | A clearly documented temperature, time, airflow, or UV-energy window with repeatable results | Use a calibrated oven, dryer, or radiometer; confirm the finished print through adhesion and resistance testing. | A defined process window helps prevent under-curing, over-curing, blocking, and inconsistent production output. | High |
| Technical Performance | Wash and abrasion resistance | Pass the customer’s specified wash-cycle and rubbing requirements without unacceptable cracking or loss of color | Test finished prints after the agreed laundering method and dry or wet crocking procedure. | Durability is essential for garments, reusable bags, workwear, and other products exposed to repeated handling. | High |
| Technical Performance | Open time and screen stability | No skinning, excessive drying, or significant viscosity drift during the planned production interval | Run a controlled screen test for the intended idle and operating periods, then inspect print quality and screen cleanup. | Longer stable open time can reduce stoppages, screen blockage, waste, and operator intervention. | Medium |
| Safety and Compliance | Restricted substances and chemical disclosure | Current safety data sheet and documented compliance with the destination market’s applicable requirements | Review the SDS, technical data sheet, restricted-substance declaration, and independent test reports when required. | Documentation supports legal compliance, worker protection, customer audits, and responsible material selection. | High |
| Supply Reliability | Batch traceability and retention samples | Lot number, production date, shelf-life information, and retained reference sample for every shipment | Audit packaging labels, certificates of analysis where applicable, and the supplier’s complaint-investigation process. | Traceability enables faster root-cause analysis and more reliable control of repeat production. | High |
| Supply Reliability | Shelf life and storage requirements | Clearly stated shelf life with storage temperature, freezing, humidity, and container-sealing guidance | Review technical documents and inspect whether delivered material remains within its stated shelf-life period. | Correct storage preserves viscosity, dispersion, curing behavior, and color stability before use. | Medium |
| Technical Support | Application guidance | Written recommendations covering mesh, squeegee, additives, curing, substrate preparation, and troubleshooting | Request a documented print recipe and assess the supplier’s response to a defined technical case. | Practical support shortens setup time and helps separate ink-related issues from equipment or process problems. | High |