Pigments and Epoxy resin

dave_gibsea

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Hi,

Can anyone tell me if it is possible to get pigments for epoxy coatings to colour them? Sorry if this a dumb question, I've used pigments with GRP but epoxy is new to me as a coating. Cheers, Dave
 
On occasion, we use powder as well as pre-dispersed pigment concentrate. Powders need a lot of work to disperse properly into an epoxy. A ball, or other high shear mixer, works well. but most people won't have access to that. A pre-dispersed pigment concentrate that is epoxy compatible makes for easier mixing one off and smaller jobs. If you are searching for a supplier, look under colourants as well as pigment. The supplier should be able to advise for resin compatibility.
Good luck.
 
Depends what you are doing with it. If you are laminating then a little colloidal silica (Cabosil) will stiffen to form what is called a pregel and is used where the substrate is porous as it stops the resin being sucked into the job.
If you are coving then you should use micro fibres and cabosil. a little sawdust will do no harm but not realy a good idea for structural use.
Hope that helps
 
[ QUOTE ]
Hi,

Can anyone tell me if it is possible to get pigments for epoxy coatings to colour them? Sorry if this a dumb question, I've used pigments with GRP but epoxy is new to me as a coating. Cheers, Dave

[/ QUOTE ]
Be wary of the fact that epoxies generally have very poor UV resistance and should therefore be coated with a solid paint, or UV varnish. While tiniting the epoxy seems attractive, you'll find that in as little as 3 months an epoxy coating will fail.
 
Re: Stitch and Tape construction

Have a look here
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It might be a good idea, for future reference, to experiment on some resin left-over. NOT on the actual job, of course!

When I wanted some coloured Gelcoat for a mould and all I could find was either clear or white, with a smallish jar of pigment costing close to 10 - 12 of your money, I found that I could get practically any colour that I wished by using the powder paints that are used in kindergartens! MUCH less expensive.

Another 'discovery' was that liquid release wax can be changed from colourless to <span style="color:blue">very visible</span> through the simple addition of a few drops of food colouring /forums/images/graemlins/wink.gif

Never hurts to try: if it does not work out you'll remember that it doesn't when you have to find a quick solution in an emergency. That doesn't sound quite right but I hope that you get the gist of what I am trying to say.
 
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