Patch Testing Protocols — Quick Reference Card

Q: Primary sources (national & international authorities)

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Quick Answer: One-page reference card for patch testing protocols in salons. Professional salon compliance guide for beauty professionals.

Expert-supervised by Takayuki SawaiGyoseishoshi (行政書士) — Licensed Certified Gyoseishoshi, JapanAll MmowW content is supervised by a nationally licensed regulatory compliance expert.

Quick Answer

One-page reference card for patch testing protocols in salons.

Table of Contents

1. What is patch testing protocols?
2. The minimum you must do
3. Key numbers to remember
Primary sources (national & international authorities)

1. What is patch testing protocols?

The 48-hour patch test is the clinical standard for predicting allergic contact dermatitis before salon chemical services^[1]. Applied to the post-auricular area or inner elbow, a small amount of the exact product to be used is left in contact with skin for 48 hours. In any country, the cosmetics authority’s guidance specifies when patch testing is mandatory or recommended^[2].

2. The minimum you must do

Daily salon patch testing checklist

Patch test scheduled 48h before colour appointment
Inner elbow or post-auricular site cleaned
Correct product (same batch) applied in small amount
Client given written aftercare instructions
48h follow-up appointment confirmed
Positive/negative result recorded in client file
Client informed of re-test requirement if product changes

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3. Key numbers to remember

Indicator	Baseline	Target	Time	Measurement
48h patch test completion rate	Variable	100% before oxidative dye	Immediate	Client record
Correct product/batch match	Variable	100%	Immediate	Product log
Follow-up attendance rate	Variable	95+%	1 month	Appointment log
Positive reaction protocol compliance	Variable	100%	Immediate	Incident log
Re-test on product change compliance	Variable	100%	1 month	Client record

Primary sources (national & international authorities)

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Important disclaimer: MmowW is not a beauty-regulation certification body. The content above is educational best-practice writing distilled from primary national-authority sources (WHO, FDA, EU Reg 1223/2009, national health departments). Final responsibility for compliance rests with the salon operator and the relevant authority. Always verify with primary sources and your local regulator.

Takayuki Sawai — Gyoseishoshi

Licensed Gyoseishoshi (Certified Gyoseishoshi) and founder of MmowW. Making salon compliance easy for beauty professionals worldwide.