Page 144 - Injection Molding Advanced Troubleshooting Guide
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15 Black or Brown Specks

















          „ „15.1„ Description



          Black or brown specks are spots of degraded plastic or dark contamination that
          show on a molded part. This issue will be much more visible on white or clear
          molded parts.
          Also known as: carbon buildup
          Mistaken identity: material contamination




























          Figure 15.1  Black specks
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