| 摘要 |
A dust-proof film is made from a material which contains a cellulose ester and whose transmittances of light having a wavelength of 365 nm and a wavelength of 436 are9g8% or more, or the dust-proof film is formed of cellulose propionate whose weight average molecular weight using polystyrene as a reference is 60,000 - 400,000. The dust-proof film has a long life and excels in light resisting properties with respect to the i-line. In addition, the dust-proof film is useful as a long-life pellicle for a broad line and exhibits high light transmittance properties with respect to both the i-line and the g-line. |
