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kipsas
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I have recently started making some emax crowns/onlays, and first few were all fine, but now I faced a problem, none of my colleagues were able to help me with, so I thought I should ask a bigger community
So everytghing is file until I put the glaze on a finished crown. The crown is all pressed, individualized with stain (no additional layering),after the stain firing in the oven crown looks fine, but after the glazing - whole crown looks like if it was treated with smoke - grayish, with dark spots (especially where the glaze might be thicker - like fissures, or edges near the margins). I am attaching a picture, the crown should be B1 shade, though looks 3-4 shades darker (sorry for no reference pic with shade tab, will post tomorrow),
Maybe some of you have experienced similar issues, and could help me identify what might be causing this staining?
Thanks for your help