Never had that problem Malcolm, but I don't use many pressables, faster for me to stack/finish the porcelain than take the time to wax it up. The only problem I have had with the e.max is a yellow tint, but i realized after awhile it was only coming from my YZ (Zirconia) crowns, cleaning cycle on the sintering oven fixed that. As for the e.max porcelain, I still trap air bubbles from time to time. I think it's because I work out of the bottles instead of mixing on a glass slab. Other than that, I like it, building it is really nice.
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