What can cause a chemical service to have unexpected results?

Choosing not to follow the manufacturer's instructions or miscalculating product application can significantly impact the outcome of a chemical service. Each product comes with specific guidelines that outline the exact amount to use, application techniques, processing times, and safety precautions. Deviating from these instructions can lead to uneven results, potential damage to the hair, or allergic reactions.

Additionally, miscalculating the amount of product needed can cause either insufficient coverage, resulting in an uneven appearance, or excess product, which could lead to unexpected reactions during the process. Proper adherence to instructions is essential for achieving the desired result and ensuring the safety and satisfaction of the client.

In contrast, while using the wrong shampoo, choosing an incorrect color shade, or failing to consult the client can all affect results, they do not have the same direct and potentially damaging implications for the chemical service as improperly following application guidelines does.