Recent in Sensory Properties (page 1 of 2)

How Damaged is Hair? Part One: Surface Damage

This article is the first of two that explores ways of capturing and quantifying the different forms of hair damage. Here, we begin with damage to the hair surface, or cuticle, while also exploring the implications of this occurrence. A second article will focus on damage to the internal cortex structure.

The Perplexing Topic of Hair 'Type': How Do We Classify Hair?

Most hair-related properties and issues can be rationalized by fiber size and shape, and/or the consequences of extreme conditions. However, the varying reactivity of different hair types with chemical treatments suggests potential differences in structure.

'Zapping' Sensitive Skin: Capsaicin Tests Show Embelia concinna Comforts Irritation

In previous work, a flavonoid-titrated active ingredient based on Embelia concinna was shown in vitro to calm and soothe sensory neurons stimulated with capsaicin. Here, those results are confirmed in vivo using a capsaicin stinging test with human volunteers.

Ranking Body Creams by Sensory Properties

Ranking descriptive analysis (RDA) is a sensory test from the foods industry. Here, it is applied to evaluate the properties of four body creams, and the results are compared with those of the well-known quantitative descriptive analysis (QDA) profiling. Findings suggest this technique could positively impact sensory testing for product development.

Yield Stress Measurements for Personal Care Part II: Methods

The previous article defined yield stress and explained how to calculate the amount needed for a given application. Here, methods for measuring yield stress are compared by determining the values of two materials: a non-thixotropic acrylates copolymer solution, and a thixotropic body wash. The results provide recommendations for methods in terms of relevance, exactness and robustness.

Lucas Meyer Measures Consumer Response to Phospholipid Emulsifier

A study conducted by Lucas Meyer revealed that its phospholipid emulsifiers were capable of invoking positive emotion.

Testing and Developing a Sugar-derived Surfactant Blend for Delicate Skin

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.

Measuring and Pre-selecting Functional Filler Pigments

Functional filler pigments play an important role in adjusting optical properties such as transparency and soft focus effects in cosmetics. However, their suitability for specific formulas is not apparent until time-consuming tests using many different fillers have been conducted. Therefore, a new method to predetermine the soft focus effects of functional filler pigments is described here.

A Dermatological View: Tandem Irritants With Synergistic, Additive or Quenching Effects on the Skin

In this article the results of six published tandem irritation studies are evaluated; possible mechanisms and clinical ramifications, albeit complex, are discussed. The clinical relevance of tandem irritation among cosmetics users and in many occupational settings appears obvious and suggests the need for further studies clarifying its principles and mechanisms.

Evaluating Hair Conditioning with Instrumental Combing

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.

Significant Statistical Differences in Sensory Research

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.

UV Transmission Assessment: Influence of Temperature on Substrate Surface

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.

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