This paper discusses a method of combining relief-phase rainbow holograms recorded by the Benton method and holograms recorded by means of the dot-matrix technology on one medium. In doing this, two different photoresist compositions were used to record the holograms, at wavelengths 488 and 441.6 nm.
A. D. Gal’pern, A. A. Paramonov, and M. Yu. Sysoev, "Using second-order diffraction when obtaining combined holograms consisting of a rainbow hologram and a hologram recorded using dot-matrix technology," J. Opt. Technol. 73, 438-441 (2006)