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100g Mouldcraft Polyurethane Pigments for Resins / Gelcoats (Polyester colour paste) Choose from Super White , Dense Black, French Blue, Green, Signal Red, Golden Yellow, Golden BrownIntended UsesDesigned as a colouring medium for polyester compression moulding, polyester extrusion and injection moulding, polyester flat sheeting production, polyester casting, and general composite construction involving styrenated polyester resins.CharacteristicsMouldcraft Polyester Colour Pastes are coloured liquid/paste mediums based on pigments dispersed within a solvent-free reactive unsaturated polyester resin. They are available in a wide range of colours varying in strength and consistency depending upon the particular colouring application. They have been developed to blend easily into resin systems. The range of colours is based upon pigments carefully selected for colour fastness, opacity, heat stability and having minimum effect upon the curing characteristics of the final system. The resin used with the Polyester Colour Paste is a specially developed solvent-free reactive polyester resin which chemically cross links with the moulding resin so that the colour is "locked in" once the system has cured. They can be used to colour most polyester resinbased systems used within the composites or related industry. Our Polyester Colour Pastes have excellent stability.Application Designed as a colouring medium for polyurethane systems, including rubber casting, liquid plastics and expanding polyurethane foams.CharacteristicsMouldcraft™ PTH dispersions are coloured liquid / paste mediums based on pigments dispersed in Polyether polyol. All PTH dispersions have a high degree of grinding and stability.Application Mouldcraft™state of the art colour matching capability ensures a high degree of colour matching consistancy batch after batch. PTH dispersions are generally used in polyurethane systems. The level of dispersion used is dependent on the final saturation of colour required. Levels above 10% are not normally used and where higher levels are required evaluation of plasticizing effects must be determined. PTH dispersions have a higher tendency to show greater compatibility over DOP dispersions with the mother system. Always perform tests to ensure the PTH pigment is compatibible with your polyurethane system, different systems will have varied degrees of tolerance for pigmentation.