Final answer:
Before sodium hydroxide processing hair, it is important to analyze the hair's condition, pH level, moisture content, and conduct a strand test to ensure that the hair is suitable for the process and minimize the risk of damage.
Step-by-step explanation:
Before sodium hydroxide processing hair, it is important to analyze the hair for any chemical or physical factors that may affect the process. This includes checking the hair's condition, texture, thickness, and any previous chemical treatments or damage. It is also important to assess the hair's pH level and moisture content, as these can impact the effectiveness of sodium hydroxide processing.
Additionally, a strand test should be conducted prior to full application of sodium hydroxide to ensure that the hair can withstand the process without excessive damage or breakage. This involves applying a small amount of the sodium hydroxide solution to a strand of hair and monitoring the reaction. If the hair becomes excessively damaged or shows signs of breakage during the strand test, it may not be suitable for sodium hydroxide processing.
In summary, before sodium hydroxide processing hair, it is important to analyze the hair's condition, pH level, moisture content, and conduct a strand test to ensure that the hair is suitable for the process and minimize the risk of damage.