Special-color matching starts with a reproducible target, not a color name. The same formula can look different when substrate whiteness, coating, film surface, ink film, drying, curing, or finishing changes. A repeatable color needs an approved baseline.
Define the color reference
Use a physical color sample or approved print as the primary reference. A Pantone or other library code helps define direction, but record its version and substrate category. If LAB, density, or an internal standard is used, fix the instrument, measurement condition, measurement points, substrate, and tolerance. A screen image must not be the only production standard.
Information needed before matching
- Physical sample or color reference, substrate sample, print method, press, color sequence, coverage, and drying or cure method.
- Planned lamination, varnish, foiling, die-cutting, creasing, rub, or chemical-resistance requirement.
- Trial quantity, expected volume, delivery timing, and repeat-order requirement.
Approval and repeat workflow
Match first on the production substrate, then confirm under normal press conditions. Change one variable at a time and record the reason. Complete all planned finishing before final sign-off, because coating, lamination, foiling, or creasing can alter color and surface reflection. Retain the physical standard, formulation or ink identification, substrate batch, press settings, measured values, drying/cure condition, and finished approved sample.
Check these causes first
| Symptom | Check first |
|---|---|
| Same formula shifts on another stock | Whiteness, coating, absorption, and surface condition |
| Good before finishing, different after finishing | Coating/lamination, cure or drying, base ink, and reflection |
| Repeat job does not match | Standard version, formulation record, substrate, and press record |
| UV color cracks or loses adhesion | Substrate, ink film, cure, and actual finishing test |
For custom work, review Custom Special Color Inks and Process / Spot Offset Inks, then send the color and production information for a trial plan.