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Deciphering optical phenomena such as specular and diffuse reflection, distinguishing between SCI and SCE measurement modes, and providing guidance on using a combined colorimeter and glossmeter to accurately isolate color defects from surface gloss defects

In the middle of the night shift, a batch of light-gray plastic emerged, streaked with debris. The machine operator took one look and did what came most naturally: he cranked up the screw speed and increased the back pressure to ensure the orange-colored pellets melted completely. By morning, the color was indeed more uniform. A few weeks later, the customer returned the entire shipment the products had become brittle, cracking at the slightest impact, and the color varied from one delivery to the next, failing to match the approved standard

Diagnosing the causes of plastic color variation, managing metamerism, distinguishing between SCI/SCE measurement modes, and applying Delta E standards for color deviation assessment in QA/QC

On the afternoon of October 19, 2026, the workshop “Solutions for Optimizing Performance and Ensuring Safe Operation of Solar PV Systems” was successfully held at Khanh Hoa College of Technology and Energy.

Decoding differential pressure parameters according to EU GMP Annex 1 and ISO 14644 standards, interpreting HEPA filter/AHU clogging levels, and applying error calculation formulas to select precise measurement ranges for project handover