Self-adhesive film for hologram formation, dry plate for photographing hologram, and method for image formation using the same

A method for image formation, comprising the steps of:

• forming a pressure-sensitive adhesive layer comprising a pressure-sensitive adhesive composition containing a pressure-sensitive adhesive on a support film to prepare a self-adhesive film for hologram formation, the pressure-sensitive adhesive composition containing a modifier capable of regulating the refractive index and/or adhesive strength of the pressure-sensitive adhesive composition;
• applying the self-adhesive film onto a laminate having a layer construction of recording material layer for hologram formation/transparent substrate in such a manner that the self-adhesive film, either after the removal of a separator when the self-adhesive film has the separator applied thereto or as such when the self-adhesive film has no separator, in its pressure-sensitive adhesive layer side free from the separator, is applied onto the transparent substrate side of the laminate, thereby preparing a dry plate for photographing a hologram having a layer construction of recording material layer for hologram formation/transparent substrate/pressure-sensitive adhesive layer/support film;
• bringing an original plate for a transmission hologram into intimate contact with the dry plate for photographing a hologram through an index matching liquid in such a manner that the hologram-recorded face in the original plate faces the recording material layer for hologram formation in the dry plate;
• admitting a hologram-recording light and a reference light into the original plate for a hologram, thereby exposing the recording material layer for hologram formation;
• developing the exposed recording material layer for hologram formation by the application of an ultraviolet or heat radiation;
• and
• separating the self-adhesive film having a layer construction of pressure-sensitive adhesive layer/support film.