Using dyes and tints
Miller states that using a chemical stain should also involve using dyes and tints, because the two work hand in hand. Dyes and tints provide color variations not available in chemical stains, can be used to treat areas that did not stain well, or can lighten the stain color.
Dyes are not chemically reactive with concrete, and their appearance is translucent. They can be organic or inorganic and diluted with either water or solvents. Stain colors are more intense if stain is applied soon after concrete has been placed. Jones says dyes are azo-chromium coloring agents fine enough to penetrate concrete surfaces, and they can create bright colors not possible with stain, such as reds and yellows. Some dyes are UV-resist-ant, but those that arenít can be coated with UV-resistant sealers to make them colorfast.
Universal tints, often available in paint stores, are opaque, and the colors produced can mask deficiencies left by acid stains. Tints can also lighten the color of the stained surface.
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