건조된 유리기판은 코팅액의 두께가 10 ㎛까지 조절이 가능한 닥터 블레이드를 사용하여 점성을 갖는 불화암모늄계 부식액의 두께를 조절하여 부식 정도를 확인하였다.
For the dried glass substrate, the level of corrosion ended up being verified by controlling the thickness associated with ammonium fluoride-based etchant having viscosity using a health care provider blade with the capacity of adjusting the thickness of the coating solution as much as 10 μm.