³Ô¹Ïtv / ENGINEERING EXPLANATIONWhite PCB Solder Mask for LED Products / release checkpoints1Optical quantityKeep reflectance, gloss, visual color and system efficiency distinct.2Sample stateSpecify measurements before or after the relevant assembly and aging exposure.3Thermal pathReview copper, dielectric and cooling separately from mask color.4EvidenceRetain grade-specific data and the measurement conditions needed for comparison.Conceptual illustration. Not to scale; examples are not process settings or acceptance limits.