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Testing
New in Testing (page 22 of 24)
Dec 13, 2005 | 10:30 PM CST
How Sensory Evaluation Can Provide Development Direction: An Approach
By: Gail Vance Civille and Clare Dus, Sensory Spec…
The authors explain how linking product sensory attribute documentation, through descriptive analysis panels, with consumer exploration through one-onone interviews, provides clear direction to product development. In addition it permits the product development team to track progress of the prototypes.
Nov 01, 2005 | 03:10 PM CST
Ceramides in Skin Stress: Ultraviolet, Tape Stripping, and Crowding
By: Myeong Jun Choi, Ph.D., and Howard I. Maibach,…
Stress induces changes in the ceramide content of the skin, and may lead to compromised barrier function or skin diseases. Skin has ways of responding to these stresses, as we review here in the case of skin stressed by tape stripping, organic solvents, overcrowding, and ultraviolet (UV) irradiation.
Nov 01, 2005 | 02:52 PM CST
Torsional Behavior of Human Hair by Single Fiber Torsion Pendulum Method
By: Y. K. Kamath, TRI
Torsional properties are described by the author as a method to distinguish between the surface and the bulk effects of actives in hair formulations.
Sep 01, 2005 | 09:51 AM CDT
Skin Friction Coefficient Values
By: Raja K. Sivamani and Gabriel Wu, Department of…
Friction is an important characteristic of skin because it allows us to execute many of our daily activities. In addition, friction studies offer insight into how skin and the skin surface change across age, gender, race, anatomical site, and chemical applications. This can provide better information about expected skin variations in the population and why certain topical applications are effective.
Jan 07, 2004 | 04:11 PM CST
A Laboratory Method for Measuring the Water Resistance of Sunscreens
By: Berislav Markovic, Donna Laura and Mark Rerek,…
A new laboratory in vitro method for the measurement of sunscreen water resistance uses spectrophotometric analysis of a model skin substitute before and after 80-minute immersion. It gives good correlation with the FDA’s 80-minute immersion SPF results (very water resistant). The method is especially good for screening new formulations or water-resistant technologies.
Jan 07, 2004 | 03:46 PM CST
Computerized Measurement and Correction of Color Cosmetics
By: Nick Morante, Color Science Laboratory, Estee …
With a spectrophotometer and computerized color measurement software, the cosmetic chemist can do both basic color quality control and color formulation and correction easily in the lab.
Dec 31, 2003 | 06:19 PM CST
Cyclic Testing: Demonstrating Conditioner Benefits on Damaged Hair
By: Sidney B. Hornby, Mar-Tech Contract Services I…
Cyclic fatigue testing simulated stresses experienced by hair fibers from repeated grooming and styling. Researchers used the Weibull parameter of characteristic life to assess damage. Survival probability graphs showed conditioner use helped damaged hair.
May 06, 2003 | 02:00 AM CDT
Photoaging and Photodocumentation
By: A. Pagnoni, Hill Top Research Inc.
Techniques to photograph or image skin photodamage have reached new levels of sophistication. This survey discusses clinical grading, light imaging techniques, video-microscopy and three-dimensional in vivo measuring systems.
May 06, 2003 | 02:00 AM CDT
Testing for Dioxin and Furan Contamination in Triclosan
By: J. Menoutis and A. I. Parisi, Quantex Laborato…
Each batch of triclosan should be analyzed for trace amounts of 2 3 7 8-tetrachlorodibenzo-p-dioxin and 2 3 7 8-tetrachlorodibenzofuran, which can form as unwanted manufacturing by-products, as shown in triclosan from six commercial Asian sources.
May 06, 2003 | 02:00 AM CDT
Literature and Patent Review: Analytical and Test Methodologies 1990-2000, Part II
By: Charles Fox, Charles Fox Associates
From more than 40 technical sources published in the 1990s, the author reviews new safety tests and methodologies for evaluating preservatives, sunscreens and a variety of skin parameters.