Almost twenty years ago Dr. Dawson of Dynapol Corp. Prepared many small samples of polymeric dyes for use as harmless food colorants and non-ingestable pharmaceu-ticals. The approach was to prepare a suitable polymeric backbone to attach common colorants. Many of these backbones were not workable for attachment of dyes or had stability problems. The approach proved to be much more difficult and costly for the applications proposed. The concept, however was not without merit since polymeric substances often exhibit improved stability over their monomeric counterparts.
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