4.4 Lacquering with LP/W lacquer
For the surface finish the light-curing soft earmolds (made of LP/W) are always lacquered with
LP/W lacquer. Furthermore, all at present known hard acrylate-based otoplastic materials
can be coated with LP/W lacquer to improve the fitting of the earmold (“non-skid coating”).
•
First, the part of the earmold that is to be processed has always to be
roughened with Corund paper, grit 180, (REF 40704).
•
Then, fix the BTE earmold onto a piece of nylon tube (REF 97200). For an ITE earmold,
the alligator clip of the turning motor can be fixed on the opened battery valve.
•
Then, clean and degrease the surface carefully by using the hand-spray pump
(REF 86732) containing Surface Cleaner.
•
Apply the lacquer evenly with the brush.
•
Let the lacquer dry rotating for about 3 - 4 minutes in the light-curing unit.
•
After the polymerization, the earmold
(
but do not immerse ITE earmolds with built-in
electronics – see note below!) is put into the LP-cleaner bath (in the round jar
REF 52800) and then a second polymerization in the light-curing unit egger EL 3 is to
be done for about 3 – 4 minutes. This process is necessary to remove the inhibition
layer (sticky surface) as a result from the first polymerization.
•
To finish the process, the earmold is rinsed under water and is blow-dryed.
ITE earmolds with an built-in electronic can also be coated with LP/W lacquer.
Please observe, however that the earmold should not be put into the
LP-cleaner bath! To remove the inhibition layer use a Surface Cleaner moisted
cloth and wipe off the surface thoroughly.
4.5 Modifications/Repairs with modeling pastes
The LP/H modeling pastes can be universally used for various modifications and repairs with
all kinds of hard UV-curing polymerizates or acrylates.
•
First of all, the part of the earmold that is to be processed has always to be
roughened with Corund paper, grit 180, (REF 40704).
•
Then, clean and degrease the surface carefully by using the hand-spray pump con-
taining Surface Cleaner.
•
Apply the modeling paste directly from the tube with the modeling instrument
(REF 31215) and smooth the transitions to the ground.
•
Then, depending on the coating thickness applied, let it cure for about 2 – 6 minutes
in the light-curing unit egger EL 3.
•
After the polymerization of the surface, wipe off the earmold by using a surface
cleaner moisted cloth.
•
If required, rework the earmold with a cutter and prepare it for lacquering as
described in 4.3/4.4.
Summary of Contents for EL 3 51310
Page 10: ...Notizen Notes ...
