Page 162 - Injection Molding Advanced Troubleshooting Guide
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17 Brown Streaks
17.1 Description
Brown streaking is a discoloration of the material usually but not always resulting
from material having become excessively hot or dead spots where material hangs
up. Note that these discoloration streaks may appear as a color other than just
brown. See Figure 17.1 for an example of brown streaking.
Also known as: discoloration, streaking, degradation
Mistaken identity: contamination
Figure 17.1 Example of brown streaking just inside of gate
