Tips for Achieving Consistent Color
- Don't rely on the color charts or cards provided by the color supplier to precisely represent what the final results will be on your project. These color samples generally show what can be expected when using a "generic" mix made with a medium-gray shade of cement. The only way to verify the final color for your project is to perform a trial placement with the actual mix you'll be using. Most color suppliers will provide samples of their products so you can conduct preconstruction trials. Be sure to prepare a sample for each color and mix design you plan to use.
- Keep the mix design consistent for every batch of concrete used on the job, including cement type and brand, aggregates, and water-cement ratio. If using supplemental admixtures or cement substitutes, make sure they are added to all the batches of concrete on the project.
- Inconsistencies in finishing practices, timing of operations, choice of release agents, and curing and sealing methods can also result in slight color variations. Keep things status quo throughout the project.
- Whether you're using an integral color or a dry-shake color hardener, note the specific color used, amount, and the name of the manufacturer. This will permit you to duplicate the same color effects on a different project, assuming you stick with the same mix design and placement methods.
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