Fluoresceine, rhodamine... second try.

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Hello.

As a kid in the sixties I read on a chemistry and physics experimenter's book written for young readers, a simple process to home make something like what is now named rhodamine, capable of dying a whole pool water deep red with a few drops. Cannot find it now...

Does anyone know how to make such a highly concentrated water soluble dye/ink/colorant with simple compounds ? Sort of remembering borax as one ingredient, but not sure after 35 years.

 

Oh, those days with no television, no internet... and plenty of good books to discover !

Thanks,

Miguel

 

(YT had a good suggestion using oriental food dyes, but still trying to find the elusive formula; maybe new members at this forum have other clues now.)