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The February 1988 issue announced that three companies, all in the USA, were entering the market--or thinking of doing so--for personal dichromated gelatin (DCG) holograms. Portson, a Kansas company founded by Mike Porter, had started to produce pendants (the mainstay of DCG holography in its early days) and larger display holograms, with initial input from Rich Rallison on DCG techniques.
The National Pen Corporation had established National Holographies as a …