Most Popular in Testing
- 1Hydration Detection as Simple as a Selfie?
- 2A Soft Touch—Concepts in Hair Softness
- 3A Safety, Toxicity and Irritation Testing Primer
- 4Electric Effects: EI to Measure Skin Barrier Defects
- 5Kao Takes the Heat Off Infrared-exposed Skin
- 6Stability Testing Guidance for Product Safety and Shelf-life Insight
- 7Clinical Confirmation: Multi-step Routines Deliver Better Benefits to Skin
- 8Making Hair Loss History: Native Polyphenols to Kick-start Hair Regrowth
- 9Testing Moisturizing Claims for Skin
- 10Beating the Damaging Effects of Heat on Hair
Recent in Testing (page 28 of 34)
Aug 2, 2013 | Trefor Evans, PhD, TA Evans LLC
This article is the first in a series that will address the approaches of measuring the “strength” of hair and quantifying the manner by which this property may be altered. Specifically, it will begin with the generation of stress-strain curves through the use of constant rate extension experiments.
Jul 30, 2013 | F. Kartono, Western University of Health Sciences and H.I. Maibach, University of California School of Medicine
In this article the results of six published tandem irritation studies are evaluated; possible mechanisms and clinical ramifications, albeit complex, are discussed. The clinical relevance of tandem irritation among cosmetics users and in many occupational settings appears obvious and suggests the need for further studies clarifying its principles and mechanisms.
Jul 30, 2013 | Trefor Evans, PhD, TRI/Princeton
When formulating a hair care product, there is often a need for testing that validates the product’s technical performance. This testing provides guidance to create formulas with appropriate performance, while also communicating the product’s message to the consumer. This article discusses the use of instrumental combing measurements when formulating hair conditioning products.
Jul 26, 2013 | Bud Brewster, Cosmetics & Toiletries
My dictionary has two definitions of the term significant. As others have pointed out, a research finding may be true without being important. When statisticians say a result is “highly significant,” they mean it is very probably true. Importance and meaning are determined by the consumer.
Jul 23, 2013 | M. Pissavini, S. Marguerie, A. Dehais, L. Ferrero and L. Zastrow, Coty-Lancaster International
Here, the authors describe a variable that affects the results of SPF testing in vitro—the roughness parameter—and investigate this variable using standard and molded poly(methyl methacrylate) (PMMA) substrates. They conclude that use of a molded substrate, along with the described control chart, improves the reproducibility of in vitro SPF test results.
Jul 23, 2013 | Anna Oborska, PhD, Polish Association of Cosmetics and Home Care Products Producers
Alternative test methods have the potential to reduce animal testing; however, the extent to which in vitro methods can be replaced is questionable. This article summarizes validated alternatives to test the safety of cosmetic ingredients. It also illustrates how great a challenge it is to devise a proper alternative method.
Rapid Colorimetric Analysis of para-Phenylenediamine in Henna-based, Non-permanent Tattoo Color Mixtures
Jul 17, 2013 | Christopher T. Krüger; Dirk W. Lachenmeier, PhD; Evamaria Kratz; and Gerd Mildau, PhD, Chemisches und Veterinäruntersuchungsamt (CVUA) Karlsruhe
In some henna mixtures, para-phenylenediamine (PPD) has illegally been added and it is responsible for complications such as allergic contact dermatitis. While high-performance liquid chromatography has previously been used to detect PPD, a colorimetric method that is faster and portable, described here, has been developed. For product developers, this method can be used to evaluate henna plant extracts.
Jul 15, 2013 | K. Bazela, PhD; R. Debowska, PhD; B. Tyszczuk; K. Rogiewicz, PhD; and I. Eris, PhD, Dr. Irena Eris Cosmetic Laboratories; R. Mlosek, PhD, Medical University of Warsaw; and A. Nowicki, PhD, Institute of Fundamental Technological Research
Although cellulite is not considered a disease, it is a significant cosmetic problem for many post-adolescent women. Recent studies using new diagnostic techniques such as ultrasound imaging can define the cellulite-reducing efficacy of cosmetics. However, there is still a need to standardize and objectify the testing procedures and to find parameters to measure anti-cellulite efficacy.
Jul 12, 2013 | K. Schaefer, Cosmetics & Toiletries magazine
Personal care efficacy tests are known to test the physical effects or toxicity of products, often omitting more abstract and possibly equally as important factors such as well-being.
Jul 12, 2013 | Katie Schaefer, Cosmetics & Toiletries magazine
Nowadays, however, personal care has evolved even further to encompass the root of human being-ethics and morals, where the purchase of a personal care item relates to one’s concern about the environment and animal welfare. But the involvement of ethics does not just apply to the consumers using the products; it applies to scientists conducting safety studies.
Jul 10, 2013 | Theresa Callaghan, PhD
It remains the responsibility of the manufacturer to substantiate the safety of both ingredients and finished cosmetic products prior to their being marketed.
Jul 10, 2013 | Katie Schaefer,
In 2001, Japanese researchers reported that after the age of 40, some individuals develop a malodor known as “aging odor,” attributed to the presence of unsaturated C9, 2-nonenal. George Preti, PhD, a member of Monell Chemical Senses Center and an adjunct professor of dermatology at the University of Pennsylvania School of Medicine, was interested by this report and began to conduct research of his own.