Ivoclar Vivadent IPS Empress Esthetic - Manual (Page 30)

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The sprues are cut with a fine diamond disk. Divested objects
When divesting the object, blast from the direction indicated in the schematic at the top. Note: Blast from the incisal and/or occlusal direction, if possible.
Removing the pressed object / finishing
The following procedure is recommended to finish IPS Empress Esthetic restorations:
– Wet the area to be ground and use a fine diamond disk to cut the sprues.
– Prevent overheating of the ceramic material. Low speed and light pressure is recommended.
– Smooth out the attachment points of the sprues.
– Remove the spacer prior to placing the pressed object on the die.
– Place the restoration on the die, check contact points and carefully adjust.
– Make sure that the minimum thicknesses are maintained even after finishing.
– Clean the restoration under running water or with steam before characterization.
– It is not necessary to blast the restoration with Al
2
O
3
prior to further processing.
Rough divestment is carried out with glass polishing beads at 4 bar (60 psi) pressure. Fine divestment is carried out with glass polishing beads at 2 bar (30 psi) pressure.