Zwart epoxy pigment

Hi Anton, if you're finding the past too thick to disperse into your resin mix, it might be that you're storing or using it too cold. Like epoxy itself, our pigment pastes are fairly sensitive to temperature when it comes to their viscosity. If they're cold, they will feel particularly thick, so the first thing would be to check the temperature you're storing them at.

If this doesn't solve the problem and you are still keen to 'thin' the pigment paste for future use then yes, in theory, you could add a small amount of additional epoxy resin (resin side only) to the paste in order to dilute it slightly. However, it's important to understand that the percentage of epoxy that's already been used to disperse the pigment is very small, which is why we don't suggest you need to allow for it when calculating your hardener ratio in your resin mix. If you start to add significantly more resin to the pigment paste then you'll be getting into a territory where you do need to allow for the extra resin in the pigment.

Our West and Senior Epoxy Pigments are designed to work with all epoxy resins. However there is always the odd chance of incompatibility if the epoxy is for a unique use or formulation. So we would recommend contacting your resin manufacturer if you have any doubt, or simply conduct a small curing test before using the pigment on your main project.

The pigment ratio is based on the total weight of the resin AND hardener. However, for mixing purposes we always recommend adding the pigment to the resin part BEFORE adding the hardener to allow you plenty of time to properly mix, so that means you will just need to plan ahead slightly so you know what your total resin and hardener mix will weigh.

These pigments are a thick liquid paste (dispersion)

Yes, certainly. In fact, with the range of pigments that we carry, you can mix them together to achieve just about any colour you need.

Our pigments have a stated shelf-life of 12 months however I don't think there would be any problem using a pigment that was well past this age. We wouldn't sell an old pigment but I have experience of using 3yr old pigments and encountering no problems. As with anything, storing appropriately and sealing tightly would be important.

Yes these pigment pastes are suitable for use with the GlassCast range of resins and can be used to make a bold opaque colour.

The XCR basecoat is essentially XCR Coating resin with this black pigment added to it (plus some additives to make it slightly more thixotropic). Pigment has already been added to the basecoat resin at 10% which is at the upper end of how much pigment can be added to a resin but if you wanted to experiment with making increasing the intensity of the pigment further then you could try adding up to a maximum of an additional 5% by weight of this pigment to the basecoat. Don't add any more than 5% or you will be in danger of starting to inhibit the cure.

As the resin is still basically an epoxy, ALL of our epoxy compatible pigments will work fine with the bio resins. This includes the epoxy pigment pastes, CULR pigments, SHIMR powders and Translucent Tinting Pigments.