I am currently studying in Japan. Today I found several study books in our school bookstore that included a red, opaque sheet of plastic. It is used to make the answers in the book, which are printed in red, become invisible. I really want to buy this plastic sheet for studying purpose, but I do not want to buy the book it comes in. Is there any place I can buy it or does anyone know what it is called in Japanese? I think it would be very useful to study kanji. I've looked for simple red see through folders that could do the same thing, but I can't find any in Hiroshima:(
I think it's sold at many stationary stores in Japan. There is no specific name for them. Just plastic sheet.
