This paper reports a new type of unbleached phase silver medium hologram on silver halide emulsion and its applications in character and image storage, such as high density data holographic recording, duplicating, reconstruction and printing of documents. A hologram of 1 mm diameter can record 1~2 pages of magziae in sextodecimo. The reconstructed images are clear without speckle noise, quality of the duplicated holograms is comparable to that of the original and has permanent lifetime. The 1st order diffraction efficiency of this new unbleached phase silver medium grating is about 20%.