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Home / R&R Academy / Defect Analysis / Positive Metal Defects / Pimples

Pimples

pimples.jpg

Pimples present as sharp grains on the casting surface. This defect indicates that the metal managed to slightly penetrate the primary shell coat in some areas. 

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Technical Support

Struggling with a specific casting defect or just need general technical support?

Email our technical team at: Technical@ransom-randolph.com.​

The causes of this defect are evident in the shell portion of the process. To cure these causes, R&R recommends taking the following actions.

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