Kulzer HERAVEST Onyx Mode D'emploi page 7

Indication/
Pattern material
1. Crown and
- Wax
bridgework
2. Outer copings
and small-span - Pattern Resin
bridges
3. Outer telescopes - Pattern Resin
4. Investment Special BS Liquid 3 can be used to obtain greater expansion.
Mixing ratio: 100 g Powder - 22 ml Liquid
Stirring
Use a spatula to stir the investment material by hand until the powder has been wetted thoroughly.
u Mixing in vacuum
60 seconds
Place in vacuum for 15 seconds but without switching the paddles on. Mix for 60 seconds. Check the
vacuum/paddles frequently for correct functioning. Inadequate vacuum results in inaccurate fi t and
bubbles on the casting.
Working time
Approx. 7 min. at ap-prox. 22°C (Room temperature)
The working time depends on the room temperature. Warmth curtails the working time.
Use only steel rings with
cellulose ring liners
Investing
Fill the ring with investment: only use a vibrator if it is required to improve the fl ow. Avoid high vibra-
tion! This will lead to the formation of bubbles and breakdown of the mixture.
Placing the rings in a preheated furnace
20 minutes after start of mix. Roughen the top of the mould before placing it in the furnace!
Preheating
Set-up temp. (°C)
850-950
*The holding time should be extended if several rings are to be heated at the same time.
u Expansion control (%)
alloy
Bonding alloys
Nickel chrome molybdenum
(NiCrMo)
50 – 60
65 – 75
–
u Suitable ring systems
Casting ring – X1 and X3 steel:
We recommend using one dry cellulose ring liner with Vaseline.
Casting ring – X6 and X9 steel:
We recommend using two dry cellulose ring liners with Vaseline.
u Speed preheating
Final temp. (°C)
max. 950
Bonding alloys
Cobalt chrome molybdenum
Hold-times (min.)
(commences once the fi nal temp. is attained again)
X1 X3
30 30
(CoCrMo)
70 – 80
75 – 85
90 – 100
X6 X9
45 60
7