Quote:
Originally Posted by TheLabGuy
Anyone ever notice that when you layer the LT for veneers that the LT substructure doesn't glaze well at all. Anybody have any secrets out there that would help would be duly appreciated....Thanks
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I can help you! You are correct, the portion of the veneer (or crown) that is layered with the e.max ceram porcelain glazes very nicely (as this is nice sintered glass) & the LT (or lithium discilicate) portion doesn't glaze well. The reason is the LT portion, under extreme magnification is a rougher (but very strong) surface that must be "pre-polished" briefly with a diamond impregnated wheel or suitable pre-polisher. Just enough to smooth that lithium discilicate surface to accept the glaze a bit better. Without doing this step the glaze is just filling in the rougher areas of the surface, hence giving you the lackluster shine. Glaze application and temperature can also play a role. Be certain your using the e.max glaze and you may have to bump your high temps a bit and adjust your vacuum release based on your high temp. Hopefully this will get you on the right track!