Search Cosmetics & Toiletries: Page 5

266 Results

Section: Testing > Method/Process

Predicting the Percutaneous Penetration of Cosmetic Ingredients

While previous algorithms for predicting the skin absorption of permeants was based on in vitro data, the present article proposes a quantitative structure-activity relationship (QSAR) model based on in vivo human data. Here, a set of human in vivo data is described that provides entry into predicting the penetration of cosmetic ingredients.

Objective Emotional Assessment of Perceivable Wellness Effects

Pulse volume amplitude, skin conductivity, facial muscle activity and other psycho-physiological parameters can give an objective emotional assessment of consumer response to personal care products, enabling substantiation of claims for wellness effects, as demonstrated here in the setting of cosmetics and fabric care.

Characterization of Multilamellar Vesicles for Cleansing Applications

In the present article, the authors characterize a multilamellar vesicle (MLV) system used in personal care and verify its structure via X-ray scattering, rheology and fluorescence microscopy. This enabled the study of MLV formation to investigate bulk rheology characteristics. The results are presented here as application-relevant properties.

Testing for Penetration of the Skin Barrier

The skin barrier is described, after which tests and case studies illustrate how to show if actives and other ingredients have or have not penetrated the skin barrier.

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Tattoo-removal Patch Offers ‘Tat’-ilizing Results

A clear, silicone patch is changing the tattoo removal game—Research in Lasers in Surgery and Medicine found that removal treatments using the patch could be almost three times as fast at traditional methods.

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ACS Analyzes Microscopic Views of Hair Interaction

The ACS announced at its 236th meeting that it has carried out a microscopic analysis of hair fibers interacting with each other. The researchers find that this information will be beneficial to cosmetic chemists who formulate hair repair products.

Researchers Initiate Automation of Skin Model Production

Instead of just a single layer skin model of a single cell type, the researchers have access to a patent-protected skin model that consists of two layers with different cell types. The researchers liken this model to a perfect copy of human skin and are in the process of developing the first fully-automated process chain for manufacturing two-layer skin models.

Measured Dermal Effect of Applying Retin-A

The research reported here focuses on the dermis because it is the site of the primary water retention molecule, hyaluronic acid (HA) in the skin.

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Big Data with a Grain of Salt

Now that we’re tallying up results from intricate tests of genetic up- and down-regulation, alterations in our body’s microbiome and neuron response patterns for product likes/dislikes, we have to be careful.

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Analyzing Deposition from Rinse-off Hair Products

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.

Olay Breakthrough Identifies Traits of ‘Ageless’ Women

The Multi-Decade and Ethnicity (MDE) study reveals biological commonalities among a subset of women who look exceptionally younger than their age.

In Vitro Model for Decontamination of Human Skin

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.

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Measuring the Antioxidant Potential of an Acai Extract

The antioxidant potential of cosmetic materials can be evaluated by several methodologies, including a commercial kit that measures total antioxidant status, as illustrated here with a commercial extract from the fruit of the açaí, a Brazilian palm tree. Applications in antiaging products are suggested.

Measuring the Antioxidant Potential of an Acai Extract

The antioxidant potential of cosmetic materials can be evaluated by several methodologies, including a commercial kit that measures total antioxidant status, as illustrated here with a commercial extract from the fruit of the açaí, a Brazilian palm tree. Applications in antiaging products are suggested.

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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.

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InVitro Received Final Approval of Ocular Irritection

During an annual meeting, InVitro International received OECD Expert Group on Skin and Eye Irritation Test Methods acceptance of Ocular Irritection. The company is now planning for how it can benefit other laboratories and what its next move will be.

A Dermatological View—Percutaneous Penetration of Amino Acids

Skin care products containing amino acids often promote the benefits conferred on the skin by these molecules. Natural amino acids found in the skin have been found to improve the health of skin through antioxidation, membrane stabilization and increasing skin’s natural moisturizing factor (NMF).

Measuring Antioxidant Capacity of Cosmetics with Emitted Light

Knight Scientific Ltd. offers a kit to manufacturers to measure the antioxidant capacity of their finished nutraceuticals and cosmetics to justify claims, produce technical documents, confirm batch uniformity and more.

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