advanced violin restoration techniques - International Specialised ...

Attachments
Check metal parts are original (gold same colour), and that the solder joints are sound for
tortoiseshell frogs, check for beetle damage, cracks and de-lamination. ADJUSTER
16. Check for rust damage and splits in rings.
Mixing proportions Powder-water 100 - 30 1 kg - 3 dl
Time for sprinkling in the powder ca. 10” Absorption time
Total mixing time
(creamy texture that pours well)
Period of time for mixture remaining usable 5’ (measured from time of mixing)
Setting time Expansion
takes place after 15’, up to 60’ ca 270
min. 7.5
after minimum of one hour, but within the next two days
in airtight container, at max. 25°C, with humidity level no higher than 50%
All utensils and containers have to be clean and dry. Use water at room temperature.
DENTAL PLASTER
Moldano blue
Mixing Proportions Powder-water 100-30 1kg - 3 dl
Time for sprinkling in the powder ca. 10’’
Absorption time
Total mixing time
Creamy texture that pours well
20 ’’ minimum
60 ’’
Period of time for mixture remaining usable 5’ (measured from time of mixing)
• Setting time
• Expansion
• Crystallization
• Solidity/resistance to pressure (kplcm2)
Hardness (kp/mm2) (measured one hour after mixing)
• Plaster cast corrections Ideal storage
• ca. 12’
• ca 0A5%
• takes place after 15’, up to 60’ ca 270
• min. 75
• after minimum of one hour, but within the next two days
• in airtight container, at max. 25°C, with humidity level no higher than 50%
The above mentioned proportions are suited to the needs of the dental technicians. For our
purposes, that is greater quantities, the mixing ratio is slightly different : 100-37
(kgxO.37)
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