Hologram Recording Materials

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Holograms need a material to record interference fringes. There are many materials that can record fringes.

Silver Halide Materials 
Basic information about silver halide holographic plates and film.
Silver Halide Chemistry 
Theory and Practice of Making Silver Halide Plates and Development.
Silver Film Comparison Chart 
A quick comparison of the qualities of different commercially made films.
Dichromated Gelatin Chemistry 
Theory and Practice of DCG Plates and Development.
Polymer Film and Processes 
Many commercially sold holograms are made from photopolymers.
Photoresist 
Taken from the electronics industry, this material can make relief holograms for embossing.
Coating Methods 
Coating Gelatin on to a glass plate is an art in itself.
Crystals 
There are many crystals that can record an image. The cost and exposure energy required is very high so they are not often used for holography.
Embossed Holograms 
These are like the holograms seen on credit cards.
Gelatin 
Used as the suspension medium to hold light sensitive particles.
Wikipedia 
Wikipedia's summary of Holographic Recording Materials.
The Elements 
The Periodic Table of the Elements
Books