Re: ink toxicity

["Richard N. Moyer" <dickmoyer@earthlink.net>]

If they are aniline dyes, and only Epson can tell us, what you are
referring to as aniline dyes are what are called azo dyes, meaning they
contain a certain nitrogen segment (nitrile) derived from azo benzene, or
aniline. They are not usually soluble in water, making them "fast" dyes.
Also, very potent, are are a huge family - all with very long names
spelling out the other molecule segments which impart certain colors. Most
all aromatics, including benzene - and derivatives (the high octane
component in gasoline) are carcinogenic over the long haul, but these
mostly are the intermediates of the final compound. I believe, and someone
else can corroborate, that azo dyes used in the graphics industry are
approved by an industry group for use. Normal use, that is. The solvent is
usually alcohol, not sure if methyl (toxic) or ethyl (yes, toxic in large
quantities).

>>Tobie:
>>Are you sure the anilyde dyes are that poisonous, or the process of making
>>them?
>>Tell us, oh epson-inkjet list chemistry gurus!!!
>
>When I was in the candlemaking hobby the aniline dyes were the only option for
>vivid colored wax. You can get subtle pastels and muddy colors in wax with a
>lot of ingredients, but for that vivid red or royal blue aniline dyes was the
>answer. That was 10 years ago...
>I was taught that the aniline dyes were very toxic. They came in *very* small
>quantities, and you were supposed to dilute them in  hot wax to make colored
>bars and use them accordingly. Extremely effective stuff, a few miligrams
>could
>make 1 liter of hot wax vivid blue. We were supposed to wear masks and gloves
>when handling them. They also were not water-soluble although I do not know if
>that applies to any aniline dye. Sortly thereafter they were banned (here).
>AFAIK aniline dyes are carcinogenic and destroy  the liver.
>I would be very surprised if epson inks have aniline dyes in them.
>
>
>
>
>Sergios.
>
>--------------------------------------------------
>Alternative Factor
>http://www.altfactor.gr
>
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Dick Moyer
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