Final answer:
Brushing could be a potentially bad idea prior to tinting the hair, as it can damage the hair and scalp, and potentially lead to color inconsistency. Strand testing, pre-softening, and P.D. Test are generally recommended steps.
Step-by-step explanation:
Of the procedures listed prior to tinting the hair: a) Strand testing b) Brushing c) Pre-softening d) P.D. Test, the one that might not be advisable is b) Brushing. Brushing the hair before applying hair tint can sometimes cause damage to the hair and scalp, especially if the hair is already dry or damaged. Over-brushing can strip the hair of its natural oils, leading to dryness, breakage, and color inconsistency when the tint is applied.
Meanwhile, the other options are generally recommended steps. Strand testing is done to ensure the dye meets the desired color, pre-softening is often done to allow the dye to better penetrate the hair shaft, and a P.D. Test (Patch Test) is done to test for potential allergic reactions to the dye.
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