Most Popular in Testing
- Heat Protection Getting Warmer: Specialty Silicones for Hair
- Nonreactive Paths to Internal Changes: Modifying Hair’s Structure from the Inside, Part 2
- Testing and Developing a Sugar-derived Surfactant Blend for Delicate Skin
- Evaluating the Physiochemical Properties of Emollient Esters for Cosmetic Use
- Evaluating 1,3-Propanediol for Potential Skin Effects
- VIDEO: P&G Scientists on Claims Substantiation in Anti-dandruff Care
- Modifying Hair’s Structure From the Inside
- Measuring Hair Strength, Part I: Stress-Strain Curves
- Zeta Potential and Particle Size to Predict Emulsion Stability
- 'Zapping' Sensitive Skin: Capsaicin Tests Show Embelia concinna Comforts Irritation
Recent in Testing (page 13 of 32)
Jun 19, 2013
The present study utilized an in vitro model to compare the decontamination capacity of three model decontaminant solutions: tap water, isotonic saline and hypertonic saline. Human cadaver skin samples were dosed with radio-labeled [14C]-formaldehyde and the surface skin of each sample was washed after each exposure with one of the three model decontaminant solutions.
Jun 19, 2013
The current preliminary study compared the sensitivity and correlation of open chamber device and closed chamber device on a tape stripping human model. The amount of SC removed by tape stripping was also quantified with a protein assay method.
Jun 14, 2013
Noninvasive subcutaneous skin imaging is a tool sought for use by the medical, pharmaceutical and personal care industries, but techniques have been lacking due to resolution and speed constraints.
Jun 11, 2013
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.
Jun 11, 2013
A sunscreen layer’s thickness is critical to its SPF. However, current regulations specify a mass application rate for testing, rather than a volumetric application rate. This significantly underrates the SPF values of mineral sunscreens due to their higher densities since, compared with their relative organic counterparts, thinner films are being tested, as will be shown here.
May 31, 2013
This study assesses the physicochemical properties of four known cosmetic emollient esters in vitro to predict their sensorial benefits and correlate their properties with in vivo sensory attributes. This evaluation serves as a guide to selecting specific emollient esters for various cosmetic applications and to predicting their sensory attributes.
May 31, 2013
The present study uses confocal laser scanning fluorescence microscopy to assess the penetration of protein hydrolyzates into hair. While higher amounts of protein were found in the cuticle, still significant quantities were observed in the cortical parts of hair, and this penetration was enhanced by longer incubation times.
May 31, 2013
Genomics assists product developers in understanding the expression of specific genes and their relationship to particular skin attributes. This article reviews commonly used testing techniques, such as DNA microarray, RT-PCR, SAGE, northern blot and RNA sequencing, and describes their application in testing the effects of cosmetic ingredients and products on skin.
May 31, 2013 | Madelyn Bekker, PhD; Nicolaas Rossouw Louw; and Glenda Vanessa Webber, PhD, Sasol Wax
Differing amounts of Fischer-Tropsch (FT) wax were used in petroleum jelly and final cosmetic emulsions to evaluate moisturizing effects in skin. FT wax was shown to perform as well or better than traditional mineral-derived products.
May 31, 2013 | Denis Bendejacq, PhD, Solvay
This article reviews and assesses damage types caused to hair before and after artificial coloration, i.e., by bleaching, perming, heat treatment, UV exposure and shampooing, to compare how they impact color durability individually and combined. Formulation emerges as the key to designing shampoos that efficiently deliver actives to improve color protection against these and other damage types.
Comparison of Age Determination by Three Evaluation Methods: Self-assessment, Expert Grader and Naïve Grader
May 31, 2013 | Rosanna Mootoo, Nima Gohil, Cristina Stroever and Christian Oresajo, L’Oréal USA Research & Innovation
This exploratory study investigates how consumers perceive age, using objective and subjective approaches. Results of this study suggest that when a subjective approach is implemented for age determination, subjects affix their emotions to the evaluation. The reverse logic was applicable for the expert and naïve grader methods, as grader results appeared more neutral than the self-assessment.
May 31, 2013 | Chris McLeod, HPCI Media
Although this author cannot deny that moisturization capabilities can provide relief for those who suffer from flaky, itching or irritated and dry skin, it would be careless not to acknowledge the marketing-based beguilement within this moisturization sector.
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Between The Covers Discover:
- Amino acid distribution and biochemistry
- Examination of strength and anti-breakage product claims
- Hair: growth cycle, heat protection, shine, and color intensity and retention
- Overview of shampoos and issues relating to surfactants
- Science of hair color including chemical reactions and formulations
- Ethnic differences in hair and absorption of materials
- Evaluate and quantify visual properties of hair
- Dandruff-Causes and biology of the condition
- Hair styling products and polymers
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Finally! This book offers practical approach to the formulation chemist’s day-to-day endeavors by: addressing the innumerable challenges facing the chemist both in design and at bench, such as formulating with/for specific properties; offering valuable “tips” to troubleshooting issues regarding ingredient selection and interaction, regulatory concerns that must be addressed early in development, and the extrapolation of preservative systems; exploring the advantages and limitations of raw materials; addressing scale-up and pilot production process and concerns; and much more.Order your copy today.