Ivoclar Vivadent SR Chromasit - Manual (Page 15)

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Sandblast the metal framework with aluminium oxide or with
Ivoclar Vivadent Special Jet Medium.
If SR Link is used as the bonding system, remove blasting
residue only by tapping it off or by applying oil-free
compressed air.
If SR Chroma Link is used as the bonding system, the frame-
work may be steam-cleaned. Subsequently, dry with
compressed oil-free air.
The surface to be veneered must be clean to produce a bond
at a molecular level. Even invisible traces of dirt may
compromise the bond between the framework and veneer.
Consequently, all traces of dirt and grease must be
thoroughly removed.
Do not touch cleaned surfaces!
The jet pressure is chosen according to the grit size
of the jet medium. We recommend using aluminium
oxide, Type 100 microns, at 2 bar pressure to sand-
blast the framework. The use of a lower grit size
and/or jet pressure may result in the material
chipping off.
After having been fitted to the model, the metal framework is finished. After having been fitted to the model and completed, the metal framework is sandblasted with aluminium
oxide.
Completed framework fitted on the model.
Use only metals that are resistant to corrosion and
oral conditions. Alloys which have a high silver or
copper content are prone to corrosion in the oral
cavity and we therefore advise against using them, particu-
larly if they contain more than 50% silver or copper. Alloys
that have a precious metal content of more than 90%
develop only a limited amount of bonding oxides. They
must therefore not be used.
Please take the alloy manufacturer’s information about the
alloy’s resistance to the conditions in the oral cavity into
account. That information has to be considered to produce a
long-lasting, reliable restoration.
Metal framework after sandblasting and cleaning.