'Testing Tactics in Hair' Column Series — An Index of Works by Trefor Evans, Ph.D.

Nov 10th, 2023

From 2013-2020, advisor and columnist Trefor Evans, Ph.D., wrote the column series, 'Testing Tactics in Hair' for C&T, which is treasure trove of information for those working in the hair care space. Following is an index, complete with links.

From 2013-2020, advisor and columnist Trefor Evans, Ph.D., wrote the column series, "Testing Tactics in Hair" for C&T, which is treasure trove of information for those working in the hair care space. Following is an index, complete with links.

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From 2013-2020, advisor and columnist Trefor Evans, Ph.D., wrote the column series, "Testing Tactics in Hair" for Cosmetics & Toiletries (C&T), covering methods to measure hair damage, treatments, claims and more. It is a treasure trove of information for those working in the hair care segment.

Following is an index of these works, linked to the full articles in past digital editions of C&T; plus two archived articles (one provided as a download, one linked to our website), to complete the set. Note that you must be logged in to access the digital magazines but creating an account is FREE. Also, please allow several moments for the pages to load. We hope this is a useful tool to you.

Archived Article:

August 2011: Evaluating Hair Conditioning with Instrumental Combing

November 2014: Hair as a Test Substrate

Columns:

May 2013: Consumer vs. Scientific Language: Relating In vivo and In vitro (beginning of column)

August 2013: Measuring Hair Strength, Part 1; Stress-strain Curves

Dec 2013: Measuring Hair Strength, Part 2; Fiber Breakage

March 2014: Measuring the Water Content of Hair

June 2014: Quantifying the Performance of Hair Styling Products

Sept 2014: Quantifying the Performance of Hair Styling Products, Part 2

Jan/Feb 2015: Quantifying Hair Color Fading

May 2015: Defining and Controlling Frizz

June 2015: Beating the Damaging Effects of Heat on Hair

Jan 2016: Coiffed Conundrum; Equating the Measurement of Hair Shine

March 2016: Modifying Hair's Structure from the Inside

June 2016: Nonreactive Paths to Internal Changes; Modifying Hair's Structure from the Inside, Part 2

Sept 2016: A Sunny Disposition; The Effects of Sun on Hair

Nov/Dec 2016: The Perplexing Topic of Hair 'Type' - How Do We Classify Hair?

April 2017: How Damaged is Hair? Part One: Surface Damage

June 2017: How Damaged is Hair? Part II: Internal Damage

July/Aug 2017: How Damaged is Hair? Part III: Better Defining the Problem

Sept 2017: New Ideas on Breakage: Mending Existing Flaws

June 2018: Body Talk: Defining Volume - A Technical Dissertation on Hair Body and Volume

Oct 2018: Your Hair on Acid: The Influence of Carboxylic Acids

Nov/Dec 2018: Quantifying Visual Aspects of Hair

March 2019: Tress Stress: How the Environment Affects Hair

June 2019: Grooming Habits: A New Focus for Ethnic Care

Nov/Dec 2019: A Soft Touch: Concepts in Hair Softness

April 2020: Conscientious Claims: Consumer Perception Before Formulation

June 2020: Beyond Biology: Why African Hair is Fragile

Sept 2020: Testing Equipment: A 'Buyer's Guide'

The DNA & Cosmetics consortium, comprising Clarins, Croda Beauty Actives, DNA Gensee, Greentech, L'Oréal and Nuxe, is working toward a database that can connect the dots along the natural ingredient supply chain.

[updated] The DNA & Cosmetics Consortium Developing Database for Beauty Ingredient Traceability

France-based DNA Gensee features "a DNA analysis laboratory to identify the plant species present in ... raw materials, ingredients and finished products," according to the company.

Adobe Stock 380004183

Testing Tactics: Approaches to Measure Scalp Comfort and Care

This article describes examples of test methods beyond standard skin hydration, sebum and TEWL measurements being used help create scalp care products that address conditions such as inflammation, redness, dandruff, seborrheic dermatitis and more.

The goal is to provide harmonized communication to consumers — who can use the scoring system to make product purchasing decisions.

EcoBeautyScore Consortium Calls for Public Review of Methods, Scoring System by May 9

The EcoBeautyScore (EBS) Consortium is seeking public comments through May 9, 2024, to finalize its methods and scoring system that will provide beauty consumers with clear, transparent and comparable environmental impact information about products.

Kalichem CT Web Exclusive 10-21-24

Kalichem CT Web Exclusive 10-21-24

Test methods/tools, here, refer to in vitro, in vivo, ex vivo, in silico, etc., methods, tools, substrates, technologies, etc., developed for R&D purposes to support cosmetics and personal care product or ingredient claims; prove efficacy, safety and stability; etc. See who wins – join us!

Which Cosmetic Product Test Method/Tool, Device and Digital Tech Will Clinch C&T Allēs in 2024?

Which test method/tool, device and digital technologies will win C&T Allē Awards? Find out at our exclusive dinner on March 6, 2024, at the Biltmore, L.A. – alongside our captivating Beauty Accelerate event. Following are the contenders...

All updates were effective immediately upon release except the revised test methods, which are scheduled to come into force on March 1, 2024.

China Updates: Benzene Limit, 19 Test Method Revisions, Benvitimod/Tapinarof Ban

China’s National Medical Products Administration (NMPA) recently issued Notice No. 41, limiting benzene impurities in cosmetics, revising five and adding 14 test methods, and banning the tapinarof skin treatment for psoriasis.

Cosmetic Victories Trophy Adobe Stock 336135626

2 Winners and 4 Finalists Shine in 2023 Cosmetic Victories Competition

Cosmetic Victories finalists included a human skin model, natural senolytic ingredient, photoactivable algae derivative for anti-acne effects, a palm oil alternative and both in vitro sunscreen ecotoxicity and contaminant testing. See who won.

Learn more about RNA sequencing and how it benefits claims support in this exclusive podcast, sponsored by Genemarkers. Register now to listen; it's free.

[podcast] How RNA Sequencing Advances Claims Support

RNA sequencing is a newer, more dynamic approach than DNA sequencing to measure the effects of ingredients and products on skin. Rishabh Kala, Ph.D., of Genemarkers, explains its capabilities in this sponsored podcast. Listen now; it's free.

Using an oil blotting film to collect facial sebum, Kao can apply skin surface lipids-RNA monitoring technology to 'infer' skin and physical conditions such as pediatric atopic dermatitis and Parkinson's disease.

Kao's New Infant Sebum Testing Protocol Can Flag Atopic Dermatitis, Parkinson's Disease

The move is the start of Kao's expansion into health testing services.

Genemarkers Ct2302 Lead

Environmental Stress Panel for Evaluating Diesel Particulate Matter==> download our unique Gene Expression Panels Guide at no cost

Genemarkers, a trusted partner for applying genomic technologies to personal care product development, has launched a new testing service to evaluate how product formulations protect or repair skin in response to diesel particulate matter (DPM).

A letter from the FDA to Valisure, dated Dec. 5, 2022, highlighted 'methodological deficiencies' and 'analytic descrepancies' in the company's testing.

FDA, Unilever and GSK Challenge Valisure's Benzene Findings, Test Methods

The FDA recently raised concerns over the test methods of Valisure, the Connecticut-based lab whose reports over benzene in sunscreen and dry shampoo products from Unilever, GSK and others have prompted recalls and class action suits.