The pigment colour shown should only be used as a guide, as finished results can vary depending on the amount of pigment, type of cement and sand used, type of aggregate used, drying temperatures etc. it is advisable to try a small sample first so you can alter the ratios to achieve the desired result. The colour will also change as the concrete dries, which will take around 14 days.
When colouring concrete an addition rate of 3-5% by weight of cement would be recommended. It’s important to note that these pigment types have a saturation point of 7-9% and that additions of pigment beyond this rate yield no additional colour strength. Addition rates of less than 3% can be used when pastel shades are required. Similarly white cement is often used for lighter shades.
Instructions for use: best results come from adding to the dry mix of sand and ballast and thoroughly mixing: this helps break down the dye , before adding the cement and then the water. It is NOT advisable to mix the dye with water and then add to the dry mix as this won’t achieve a consistent result.
