Dyed Epoxy using various pigments

Discussion in 'General Electronics Chat' started by DC_Kid, Jun 29, 2016.

  1. DC_Kid

    Thread Starter Distinguished Member

    Feb 25, 2008
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    was testing two dying materials, red powder coat powder, and orange chalk line chalk.

    both needed about 1/4tsp to deeply dye 10cc of clear epoxy. chalk was just a tad harder to mix in well.

    the plastic powders can carry static charge into the epoxy, so for potting i would shuffle the amount needed around on a metal plate before mixing into an epoxy that is used for potting, also use a metal stick for mixing.

    with two std #12awg wires taped together (1/8" between wire centers) 240vac(rms) showed zero uA.

    [​IMG]
     
  2. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    Boat stores have pigments for coloring epoxy and polyester resins.

    As for the static, pre-mix with a little alcohol, which is generally miscible with epoxy.

    John
     
  3. shortbus

    AAC Fanatic!

    Sep 30, 2009
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  4. DC_Kid

    Thread Starter Distinguished Member

    Feb 25, 2008
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    so just an fyi, need to be careful with dyes in general, some colors can be metals based. i need to do some dielectric testing of Rit.
     
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  5. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    Most "metal" dyes will be an oxidized form of the metal (i.e., a "valence" ≥ 1 ). Some of those oxides are good insulators (e.g, aluminum); some are good conductors (e.g., lead). You will not find lead in any dye made in the USA. If it has a metal, I would not rule it out based on that alone without checking what the conductivity of that metal compound was. I suspect most Rit dyes are not based on metals.

    John
     
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