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34 Results

Type: Article

Section: Testing

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Industry Insight: Testing the Most Efficient Color Shampoo/Conditioner Duos

In this "Industry Insight," Sabina Wizemann, senior chemist of the Health, Beauty and Environmental Sciences Lab at the Good Housekeeping Institute has evaluated shampoo and conditioner pairs to identify the best performers for hair dye retention. In a recent interview, she explained how she tests these products, analyzes their efficacy and claims, and which duos exemplified the highest efficacy, compared with other products.

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Evaluating Shampoo Foam

There is probably no personal care category that is more competitive than shampoos. With this in mind, formulators of shampoos are asked by marketing to develop products to both appeal to consumers and perform (whatever “perform” means).

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A Dermatologic View—Bioengineering Analysis of Water Hydration

The water content of the stratum corneum (SC) influences almost every biophysical property measurable at the skin surface. Water hydration can be measured using the plastic occlusion stress test (POST) or the water sorption-desorption test (WSDT). These are detailed in the present article.

Using Texture Analysis to Substantiate Hair Care Claims

Texture analysis provides quantitative information about a material’s response when deformed by a controlled force. When texture analysis is applied to hair treated with various conditioners and styling fixatives, the results can help substantiate claims made about the effectiveness of these hair care products.

Interpretation of SPF In vivo Results: Analysis and Statistical Explanation

Methods for determining SPF in vivo are based on a biological response by human skin. To overcome intrinsic variation in these methods, large numbers of volunteers and statistics are required; however, these concepts are often poorly understood or worse, misinterpreted. This article discusses how these values should be interpreted and explains what they mean to formulators.

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Interpretation of SPF In vivo Results: Analysis and Statistical Explanation

Methods for determining SPF in vivo are based on a biological response by human skin. To overcome intrinsic variation in these methods, large numbers of volunteers and statistics are required; however, these concepts are often poorly understood or worse, misinterpreted. This article discusses how these values should be interpreted and explains what they mean to formulators.

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Using Texture Analysis to Benchmark Cosmetic Quality

The present article describes in detail how spreadability testing is performed using a texture analyzer. This ensures products meet their benchmarks, improving the chances of user acceptability.

Texture Analysis to Quantify Skin Care Product Efficacy

Using a texture analyzer to measure the tightness of the skin before and after the application of selected treatments, the authors demonstrate the potential of texture analysis instrumentation in testing the efficacy of skin care products and substantiating skin tightening claims.

Texture Analysis to Select Packaging and Formulate Hair Care Products

Texture analysis provides quantitative information about a material’s response when deformed by a controlled force. Examples illustrate the use of a texture analyzer to evaluate shampoo extrusion, hair spray film toughness, hair spray tackiness, styling wax hardness and aerosol canister deployment.

In vivo Quantification of Corneocyte Lipids by Image Analysis

In a new method described here by the authors, fluorescence emitted from samples and captured by image analysis is used to quantify the number of lipids present in the cornified cell envelope. This in vivo approach is fast and noninvasive and could be used to screen molecules for potential moisturizing and restructuring effects.

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Rheology and Texture Analysis Used Together to Improve Raw Material Choices

SEPPIC has developed rheology and texture analysis protocols that, when used in combination, provide useful data regarding the impact of raw material choice on all the development steps: manufacturing procedure, formulation stability, skin feeling.

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Fast Analysis of Cosmetic Allergens Using Convergence Chromatography with Mass Spectrometry

Fragrances are complex combinations of substances that are added to many consumer products to give them a distinctive smell, impart a pleasant odor, or mask the inherent smell of some ingredients—but ultimately, to enhance the experience of the product user.

The Safety Factor in Preservative Efficacy Testing

The authors explain how preservative efficacy testing is done to determine whether a formula is adequately preserved. Product contamination problems are frequently caused by inadequate preservation.

Rapid Colorimetric Analysis of para-Phenylenediamine in Henna-based, Non-permanent Tattoo Color Mixtures

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.

Image Processing and Analysis to Evaluate the Effects of Porous Polyamide Microspheres in Cosmetics

Described here is an image processing system that compensates for changes in illumination and volunteer position, and two algorithms to quantify skin texture and wrinkles. These methods evaluate skin parameters from a single image without contacting skin. Their abilities are demonstrated here in evaluations of the benefits of porous polyamide ultra-fine powders on skin texture and gloss.

Narcissus Tazetta and Schizandra Chinensis to Regulate ‘Youth Gene Clusters’—An In vitro Analysis

A blend of Narcissus tazetta bulb and Schizandra chinensis fruit extracts was developed for anti-aging benefits and tested for efficacy on a human skin equivalent. Results indicate it regulates the functions of youth gene clusters by increasing the activities found in younger skin and reducing the activities found in aging skin specific to structure, hydration, cellular proliferation and pigmentation.

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A Sense of Sensory Analysis: Testing for the Non-test Expert

Sensory analysis is an important tool that can be successfully applied to all products that impact our senses. This article provides an overview of the means with which formulators can become acquainted with the sensory properties of a cosmetic formula. By doing so, developers can ensure products fulfill consumer needs.

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Is it Toxic? EU Mandate, Part 10: Safety

For each cosmetic product placed on the EU market, a safety evaluation must be performed. This includes a review of the toxicological profile of its ingredients, with a particular focus on genotoxicity. This mandate is described here.

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