Recording method for multi-layer recording film

摘要

A recording and readout method for a multi-layer recording film including providing a multi-layer recording film comprising a laminate of plural recording films having a light absorption band in a predetermined wavelength region and having an intrinsic absorption peak; and supplying to the multi-layer recording film a light having a wavelength which is substantially the same as that of the absorption peak of each recording film to effect recording and readout; wherein provided that the light absorption band of the recording film having the absorption peak on the longer wavelength side selected from adjacent absorption peaks is present in a wave length region which is shorter than the absorption peak wavelength on the shorter wavelength side; the recording film having the absorption peak on the shorter wavelength side is caused to have an absorbance which is higher than the absorbance of the recording film having the absorption peak on the longer wavelength side at the absorption peak wavelength on the shorter wavelength side; and the recording film having the absorption peak on the shorter wavelength side is irradiated with a light having a wavelength which is shorter than the light absorption band of the recording film having the absorption peak on the longer wavelength side.