Most Popular in Testing
- 1Testing Tactics in Skin: Targeting Senescent Cells for Anti-aging
- 2Your Hair on Acid: The Influence of Carboxylic Acids
- 3Testing Moisturizing Claims for Skin
- 4China Forms Non-animal Testing Working Group, Appoints IIVS
- 5A Laboratory Method for Measuring the Water Resistance of Sunscreens
- 6Preservative Efficacy Testing: Accelerating the Process
- 7SPF 100+ Efficacy Put to the Test in ‘Actual Use’
- 8Determination of the In Vitro SPF
- 9Good Vibrations: Spectroscopic Imaging to Visualize the Delivery of Actives
- 10CTFA Preservative Challenge and Stability Testing Survey
Recent in Testing (page 22 of 30)
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.
Jul 1, 2013 | Sébastien Miksa, Dominique Lutz and Céline Guy, HelioScreen Labs
This work evaluates the impact of temperature on test substrate surfaces during the application, spreading and drying steps of the in vitro method to measure ultraviolet (UV) transmission. The authors work in a range between 20°C and 35°C, and demonstrate that controlling temperature is a key test parameter that should be strictly controlled to ensure reliability.
Jun 25, 2013 | Kwangsuk Joo, Ongsoo Kim, Heonsik Kim and Jeungyeun Yoon, Hyechon College; and Jeongrim Ahn, Junkee Jang and Jaeun Song, Cosmetic Association
This study describes methods used in a Korean study to calculate consumer exposure to lipstick and face creams. The average amount applied daily was estimated and compared with data collected by weighing containers before and after use. The data collected was 1.8 to 1.6 times greater than the estimate, so although the survey represented real use patterns, the actual data was more accurate.