In our first report, we obtained the following result that by using infrared radiation heating furnace “Technomat” on firing, the shear bond strength was 70% greater than that of conventional type furnace using on non-precious alloy as “Uni Metal”. Although there were no significant difference on precious alloy “Uni Gold” and semi-precious alloy as “Aurora”. To get more reference about shear bond strength of other non-precious alloys by using “Technomat” and the relationship of those components, 11 alloys on market were tested by the same method and structural components were investigated by ICP. The results were as follows.
1. By push shear bond test, contained Beryllium alloys showed geater strength except “OC Metal”.
2. Without Beryllium alloys changed thier color strongly after firing and all of these but “Neo Nichrombond” showed less strength than those with Beryllium alloys.
3. By IPC investigation, most alloys component exprssions were generally coincide with real components. Although “Ticon” and “Neptune” contains Beryllium despite “No Beryllium” indication.