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Home / R&R Academy / Defect Analysis / Positive Metal Defects / Air Bubbles
Air Bubbles
![air-bubbles.jpg](https://static.wixstatic.com/media/cc5f22_cfbab0b137ab4f75b703aeb3f90e4572~mv2.jpg/v1/fill/w_296,h_296,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/air-bubbles.jpg)
Air bubbles present as round or spherical metal defects or foam-like surface roughness. This defect indicates that the metal managed to penetrate the primary coat; that air is trapped against the wax pattern and the shell formed around it; or there was a void from an air bubble at the surface of the wax.
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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