Page 108 - Cosmetology_TP

COSMETOLOGY - CITS

Perform Strand Test

Perform Strand Test: Strand testing for hair color is a preliminary step performed before applying hair dye to the
entire head. This involves testing a small section of hair to determine how the color will develop and to assess any
potential allergic reactions or adverse effects.

Strand test Procedure for hair color:
1 Select a representative strand: Select a small section of hair from an inconspicuous area, such as behind
the ear or at the nape of the neck. Make sure the strand represents the overall texture and color of the hair.
2 Prepare the hair dye mixture: Mix a small amount of hair dye according to the manufacturer’s instructions.
Use the same ratio of dye and developer that you want to use for full application.
3 Apply hair dye: Using an applicator brush or gloved hands, apply the hair dye mixture to selected strands of
hair. Make sure hair is evenly saturated from root to tip.
4 Processing Time: Set a timer to monitor processing time. Typically, the strand test should be left in for the
same amount of time as the full application (according to the manufacturer’s instructions).
5 Rinse and Evaluate: After the allotted processing time, rinse the hair dye from the test strand with lukewarm
water. Do not use shampoo or conditioner at this stage. Pat the hair dry with a towel and assess the color
result. Note any changes in color, intensity, or undertone.
6 Check for allergic reactions: Monitor the test area for any signs of allergic reactions like redness, itching or
burning. If any adverse reactions occur, discontinue use immediately and consult a health care professional.
7 Analyze the results: Compare the color result of the test strand to the desired result. Determine if any
adjustments need to be made to achieve the desired shade or intensity. Consider factors such as initial hair
color, hair texture, and previous color treatments when evaluating results.
8 Adjust as needed: If the test strand does not achieve the desired color or if an adverse reaction occurs,
consider making adjustments to the hair dye formulation or processing time before applying color to the entire
head.
It is essential to perform a strand test for hair color to ensure satisfactory results and reduce the risk of unexpected
results or allergic reactions.

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CITS : Beauty & Wellness - Cosmetology - Exercise 8