Start with the finished surface
Define the target shade and finish before comparing pigment samples. A color card is a starting point; your cement, aggregate, water and curing process affect the result.
Keep the trial consistent
Use the same base mix, mixing sequence and curing conditions when comparing candidates. Record pigment addition relative to cement or binder mass, and compare fully cured samples.
Agree a specification
Request the grade-specific technical data sheet and agree on the test methods and acceptance criteria with the supplier. Do not select a grade on a shade name alone.
General guidance only. Confirm the applicable requirements and grade-specific information for your use.
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