McKenna Long & Aldridge LLP
Method for preparing photochromic film or plate
The present invention relates to a method of preparing a photochromic film or plate comprising printing a photochromic substance in the unit of an independent spot on a part or the whole of a basic material and forming a protective layer on the basic material, on which the photochromic substance is coated, so as to protect the photochromic substance. According to the present invention, the photochromic substance is printed in the unit of an independent spot so that the printed unit spots are isolated from each other, thereby prolonging the life of the photochromic substance.
LG Chem, Ltd.
Y G Y Y G
Y10T G03C Y10S Y10T G03C
additional inventional additional additional additional
Sang-Hyuk Seung-Heon Young-Jun Tae-Sik
Im Lee Hong Kang