Evaluation of the Bond Strengths between Dental Porcelain and Cobalt-Chromium Metal Frameworks Manufactured with Different Techniques after the Thermal Aging Process

Table 4

Firing schedule of each porcelain layer.

	High temp (°C)	Predrying temp (°C)	Dry-out time (min.)	Heat rate (°C/min.)	Vacuum time (min)	Start vacuum (°C)	Release vacuum (°C)
Powder opaque first	980	500	8	65	1	500	80
Powder opaque second	980	500	8	65	1	500	980
Powder dentin ceramic	935	600	10	45	0	600	925