Category Archives: Plastic


May21
Managing Color Variation in Plastic Parts: 7 Practical Tips for Better Color Control

post on May 21, 2026

Pantone color guides A few days ago, a reader asked Workingbear about color variation issues between plastic injection-molded parts, and whether there are any good ways to better control color consistency. The problem was probably caused by the purchasing team … Continue reading →

Plastic, Quality     WorkingBear    Views (1,509)     comment (0)

May13
MRB Decision-Making and Cosmetic Quality Evaluation for Plastic Parts

post on May 13, 2026

When Workingbear first joined an electronics final assembly factory as a product/process engineer, I often had to attend MRB (Material Review Board) meetings. From time to time, people would come to me asking me to evaluate rejected parts and decide … Continue reading →

Management, Manufacture, Plastic, Process, Quality     WorkingBear    Views (1,057)     comment (0)

Apr22
How to Define Cosmetic Quality Standards for Plastic Parts

post on April 22, 2026

Caption: Cosmetic scratches on plastic parts Before products are put into inventory after final assembly, electronics manufacturing factories always perform quality inspections to ensure product quality. In terms of functional performance, most products go through 100% function testing, so pass/fail … Continue reading →

Plastic, Process, Quality     WorkingBear    Views (1,197)     comment (0)
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Jun12
Impact Drop Test Requirements in Electronic Product Development

post on June 12, 2025

During the design and verification phase of electronic products, an Impact Drop Test is a standard procedure. This test is generally divided into two phases: Product Drop Test – Testing the device without packaging. Packagage Drop Test – Evaluating the … Continue reading →

Design, Plastic, Quality, Reliability     WorkingBear    Views (4,009)     comment (0)

Mar20
What is Tg (Glass Transition Temperature) and Its Role in PCBs?

post on March 20, 2025

Glass Transition Temperature (Tg) is one of the most important properties of all plastic and epoxy resin materials. In fact, the Tg value is also an indicator of the quality of the fiberglass fabric used in PCB manufacturing. However, compared … Continue reading →

Fundamental Science, PCB/FPC/PTF, Plastic     WorkingBear    Views (6,658)     comment (0)