NOCTI Cosmetology Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

Question: 1 / 400

How much can normal hair be stretched when wet?

20 to 30% of its length

30 to 40% of its length

40 to 50% of its length

When hair is wet, it undergoes a process known as temporary elongation due to water bonding with the protein structure of the hair. Normal hair can stretch approximately 40 to 50% of its original length when wet. This property is significant because it indicates how hair behaves when subjected to moisture, which can influence styling choices, chemical treatments, and care routines.

The reason this range is particularly important is that it helps professionals understand the potential risks of stretching hair too much when wet, which can lead to damage or breakage. Knowing this property assists cosmetologists in making informed decisions regarding hair care and treatments, ensuring the health and integrity of the hair is maintained during styling procedures.

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50 to 60% of its length

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