Allergy Patch Test Guide

Matt W
2025-06-24T21:48:05-07:00

A patch test and strand test are essential before beginning any hair coloring process.

1. Choose a small area behind your ear or inside the elbow.

2. Gently wash the area with mild soap and water, then dry gently.

3. Apply dye to a test patch.

4. Place the patch onto the cleaned test area and press gently to ensure good contact.

5. Leave it in place for 48 hours without touching or disturbing it.

How to Check for Reactions

✅ After 48 hours, remove the test patch.

✅ Wait 30 minutes, then check the area for reactions.

✅ Check again 24–48 hours later to see if a delayed reaction occurs.

Look for signs like:

Redness

Itching

Swelling

Rash or blisters

Burning or stinging sensation

✅ If no irritation appears after both checks, it's safe to continue.

⚠️ If any reaction occurs, DO NOT use the product under any circumstances.