Ivoclar Vivadent IPS PressVEST v1.pdf - Manual (Page 9)

– Do not mix more than 400 g investment material at the same time.
– Strictly observe mixing ratios.
– Check the function of the vacuum mixing device on a regular basis.
– Do not place the invested ring in a pressure vessel during the setting phase. This procedure changes
the physical properties of the investment material.
– Do not leave the investment over the weekend (risk of cracks and flash).
– Always remove pressed rings from the press furnace immediately after the end of the program. Place
the ring on a grid and let it cool.
– To achieve sufficient heating of the rings in the preheating furnace, the following instructions have to be
observed:
– Use max. 50% of the available space in the preheating furnace.
– Always place the rings in the rear part of the firing chamber.
– Always place set invested rings in the burnout furnace with the opening facing downward, preferably
at a 45° angle.
– The investment rings must not touch each other. Permit air circulation.
– When divesting the object, make sure that you remove only excess investment material during preblasting
at 4 bar pressure. Be careful not to blast the ceramic object at this pressure.
Saftey Warnings Warning: The investment material contains quartz powder. Inhalation of dust should be avoided.
(Prolonged exposure to dust may cause lung damage and silicosis).
Physical data according to – Compressive strength mind. 2.5 N/mm 2 – liquid concentration 50 %
ISO 9694 – 1998 – Fluidity 17–21 cm – liquid concentration 50 %
– Setting time 7–13 minutes – liquid concentration 50 %
– Linear thermal expansion 1.35–1.65 % – liquid concentration 50 %
This material has been developed solely for use in dentistry. Processing should be carried out strictly according to the Instructions for Use. Liability cannot be accepted for damage resulting from
failure to observe the Instructions for the stipulated area of application. The user is responsible for testing the material for its suitability and use for any purpose not explicitly stated in the
Instructions. Descriptions and data constitute no warranty of attributes and are not binding.