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Most Popular in Testing
- Quantifying the Performance of Hair Styling Products
- Evaluating 1,3-Propanediol for Potential Skin Effects
- Testing and Developing a Sugar-derived Surfactant Blend for Delicate Skin
- Preservative Efficacy Testing: Accelerating the Process
- Collagens I and III, and Elastin Activation for Anti-aging
- Sandblasting to Improve the Reproducibility of In vitro Sunscreen Evaluation
- Evaluating the Physiochemical Properties of Emollient Esters for Cosmetic Use
- Octocrylene Concerns Flag Industry's Attention
- From the Archives … Flexabrasion: A Method for Evaluating Hair Strength
- Proposed Method to Evaluate the Microbiological Stability of Cosmetics During Use
Most Recent in Testing
Testing and Developing a Sugar-derived Surfactant Blend for Delicate Skin
Jul 1, 2014
Vegetable-derived, mild and sustainable skin cleansing ingredients are in demand, and this has led to the development of new detergent structures. Described here is a combination of two mild surfactants that fulfils these requirements using the concept of “interrupted soap” to impart mildness. Studies to verify the functional, sensorial and mild characteristics of the new blend are detailed.
From the Archives … Flexabrasion: A Method for Evaluating Hair Strength
Jun 1, 2014
From the December 2001 issue of Cosmetics & Toiletries, this article describes how both bending and abrasion should be tested–along with extension–when evaluating hair strength, as the authors show here in tests of an active developed to increase the strength of bleached hair.
Quantifying the Performance of Hair Styling Products
May 20, 2014
There are two general classifications of hair styling products—those that help with style creation and those that prolong the style. Both facilitating style creation and promoting hold longevity stem from the presence of water-soluble polymers in formulations. This paper discusses methods to evaluate these properties and quantify performance.
Proposed Method to Evaluate the Microbiological Stability of Cosmetics During Use
May 1, 2014
The authors propose an approach to assess the microbial stability of a product during use, referred to as the Microbiological Use Test (MUT), and apply this analysis in case studies to predict the microbiological risk of commercial products. The described test has been used successfully in the development of cosmetics.
Correlating Aging with Skin’s Mechanical and Optical Properties
May 1, 2014
The aim of this study was to monitor the evolution of biomechanical and optical properties of the skin with aging. Different biophysical parameters were measured, including skin: elasticity and firmness, color, brightness, fluorescence emission, sebum content, hydration and pH. A significant evolution of the evaluated parameters with aging was observed.
Octocrylene Concerns Flag Industry's Attention
Apr 23, 2014
The industry reacts to a new study published in Contact Dermatitis reviews reports of the UV absorber octocrylene for its potential to cause photo contact allergy.
Sandblasting to Improve the Reproducibility of In vitro Sunscreen Evaluation
Mar 20, 2014
SPF test results from substrates treated using a traditional sandblasting technique are compared with those from substrates treated using a new process. Based on the topographic control of 10 batches and 34 sunscreen evaluations, the authors concluded the new process had better topographic reproducibility, consequently improving the SPF repeatability and reproducibility in vitro.
Researchers Dig Deeper Into Relationship Between Bacteria and Atopic Dermatitis
Mar 4, 2014
Researchers from the Drexel University College of Medicine have established a clearer relationship between Staphylococci bacteria and the conditions atopic dermatitis (AD) and eczema.
Collagens I and III, and Elastin Activation for Anti-aging
Feb 24, 2014
As an alternative to semi-invasive facial rejuvenation techniques, the authors developed an active ingredient to reactivate senescent fibroblasts by stimulating metabolic pathways for collagens I and III, and elastin. The biological activity of the resulting ingredient is investigated here using in vitro models, ex vivo explants and human volunteers.
Measuring the Water Content of Hair
Feb 21, 2014
Consumers have demonstrated a clear desire for hair that isn’t “dried out” while also demonstrating a clear distaste for the effects of high humidity on hair. To find the balance in creating products, it is necessary to have an accurate means of measuring hair’s water content. This article describes equipment used to perform this task while highlighting experimental variables that can produce suspect results and lead to incorrect conclusions.
‘Anti-imperfection’ Claims
Jan 24, 2014
Four tests can be undertaken to substantiate the claims covered in this article. Colorimetry analyzes pre- and post-product application skin tone. A Cutometer or dermal torque meter measures the rate of skin extension pre- and post-product treatment, and stratum corneum turnover tests and acute profilometry studies show the rate at which skin is renewed or changes in the evenness of skin occur.
State of São Paulo in Brazil Bans Cosmetic Testing on Animals
Jan 24, 2014
This ban in the Brazilian state follows a ban from India, Israel and the European Union, as well as debate and potential regulation changes in countries like China.
Analyzing Deposition from Rinse-off Hair Products
Jan 13, 2014
The most common approach to determine ingredient deposition on hair is to analyze the treated tresses, but this poses several challenges. Instead, the authors describe a novel approach based on determining the amount of ingredient collected in the rinse water, and back-calculating the amount deposited on hair. Development and validation efforts discussed here use polydimethylsiloxane as a model compound.
Measuring Hair Strength, Part II: Fiber Breakage
Jan 12, 2014
In the mechanical testing world, the tendency for materials to fail under a repeated stimulus is termed fatigue testing, and this article discusses this topic in relation to hair breakage. It will be shown that this alternative testing approach provides considerable insight into the cause of hair breakage, and subsequently allows for the identification of strategies for its minimization; it will also be demonstrated how learning this provides the underlying theory by which anti-breakage and even “strengthening” claims are crafted.
Liverpool Student Develops Alternative to Draize for Testing Mascara Irritation
Jan 8, 2014
Researchers at the University of Liverpool have developed a testing method alternative to the Draize test for mascara eye irritation using protozoa rather than animals. In addition to the new method not using rabbits, it was found to be cheaper and more reliable.
ICCVAM Requests Info on Skin Sensitization Testing
Nov 20, 2013
The Interagency Coordinating Committee on the Validation of Alternative Methods (ICCVAM) has requested the submission of new science or information on alternative test methods or testing strategies for skin sensitization, as part of a plan of action to advance this area.
Researcher Develops Hydroperoxide Detection Method for Fragrance Allergens
Nov 13, 2013
Research from the University of Gothenburg has led to a potential method for identifying allergenic fragrance compounds in consumer products by exposing them to air.
Influence of Pressure During Spreading on UV Transmission Results
Nov 1, 2013
This work evaluates the impact of applied pressure during sample spreading on the in vitro measurement of UV transmission. The authors work in a range of pressures between 50–200 g and demonstrate that pressure control is a key parameter that should be strictly controlled to ensure the reliability of test results.
C + K Introduces Tewameter with Three Probes for Better Efficiency
Oct 23, 2013
Courage + Khazaka has upgraded its well-known TEWL and barrier function measurement device, the Tewameter, with three probe heads for better efficiency.
CeeTox Inches Closer to Validating Non-Animal Skin Allergy Assay
Aug 13, 2013
CeeTox has reported positive results from the recent phase of a PETA-funded validation study performed by the Flemish Institute for Technological Research (VITO)’s Applied BIO & Molecular Systems (ABS) team.
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Finally! A practical resource on cosmetic pigments in one book. Edwin B. Faulkner offers a comprehensive look at what goes into selecting colors for decorative cosmetic products. Order your copy today.