These translucent pigments are ideal as:
- Polyurethane resin tints (such as our Waterclear Polyurethane Casting Resin)
- Waterclear polyester resin tints (such as our Waterclear Polyester Casting Resin)
- Epoxy resin tints (such as our Epoxy Coating Resin and Epoxy Laminating Resin)
- Casting Resin Tints
They have been tested with products from our own range but should also work well with resins from other manufacturers however you should always conduct your own tests as to their compatibility with other resin systems.
How to Use
As stated above, when ‘tinting’ clear resins the key is to use only a tiny amount of these translucent pigments. 1 droplet is enough to pigment around 20-40g of resin, depending on how strong you want the colour tint to be.
Remember that thicker castings will require a lower percentage of pigment because the tint will appear stronger the thicker the section is. Conversely, thinner castings will require a higher percentage of pigment in order to appear to be the same colour as thicker castings.
Tinting Mix Ratio Table
Since most electronic scales are incapable of the accuracy required to measure pigment ratios of around 0.005% we would suggest using the table on the specification tab as a guide but in all cases experimenting yourself adding a tiny amount of pigment at a time until you achieve the desired level of tint:
Dispersing the Pigment
The pigments disperse very quickly into epoxy resin and polyurethane resin. When using the pigments to tint larger quantities of polyester resin it is recommended to make a resin ‘dispersion’ by mixing the pigment into a small amount of the resin first and then mixing the small pigmented batch of resin into the larger batch to aid distribution of the pigment throughout the resin.
When pigmenting more reactive materials such as fast curing polyurethanes you will find it helpful to mix the pigment into one side of the resin (either part A or part B) thoroughly before mixing the two parts together and starting the reaction. This allows as much time as is needed to thoroughly disperse the pigment before starting the reaction. If you do choose to pigment just one side of the resin first it’s helpful to remember that the addition of the second half of the resin will ‘dilute’ the tint when you add it.