Lacquering With Lp/W Lacquer; Repairs/Modifications With Modeling Pastes - egger EL 1 Betriebsanleitung

4.6

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 (REF 307ff). Furthermore, all presently known hard acrylate-based otoplastic
materials can be coated with LP/W lacquer to improve the fitting of the earmold ("non-skid
coating").
 Firs the part of the otoplastic that is to be processed always has to be roughened with
Corundum paper, grit 180, (REF 40704).
 Then, fix the BTE earmold onto a piece of nylon tube (REF 97200) and also fix the lac-
quering holder. With an ITE earmold, the special Erkogum can be fixed at the opened
battery valve.
 Then, clean and degrease the surface carefully by using the provided hand-spray
pump with a surface cleaner (REF 31600ff).
 Apply evenly the lacquer and cure it for 4 – 5 minutes in the light-curing unit.
 After the polymerization, the otoplastic (but no ITE device with an built-in electronic –
see separate note below!) is post-cured with LP-Cleaner (REF 31300) in the egger light-
curing unit EL 1 for about 4 - 5 minutes. This is necessary to remove the inhibition layer
(sticky surface).
 Then, the otoplastic is rinsed under water and blown dry.
ITE earmolds with an built-in electronic can be coated with LP/W lacquer, too.
Please observe, however that the otoplastic should not be put into the LP-
cleaner bath! To remove the inhibition layer you use a surface cleaner moisted
cloth and wipe off the surface thoroughly.
4.7 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. These are available in the colors trans-
parent, beige, red and blue.
 First the part of the otoplastic that is to be processed always has to be roughened
with Corundum paper, grit 180, (REF 40704).
 Then, clean and degrease the surface of the otoplastic carefully with Surface
Cleaner (REF 31600).
 Directly apply the modeling paste out of the tube with a modeling instrument (REF
31215) and smooth the transitions to the ground.
 Then, depending on the coating thickness applied, let it cure for about 2 – 4 minutes
in the light-curing unit egger EL 1.
 After the polymerization of the surface, wipe off the otoplastic by using a surface
cleaner moistened cloth.
 If required, rework the otoplastic with a cutter and prepare it for lacquering as de-
scribed in 4.5/4.6.
Betriebsanleitung/Operating Manual EL 1 REF 51100/51120V03-2014-12 Seite / Page 21 von / of 24