Recent in Methods & Processes (page 14 of 14)
Jan 13, 2006
Perfume, paint and cosmetics can be manufactured without producing as much toxic waste, according to recent report.
Dec 23, 2005 | Johann W. Wiechers, PhD, Caroline L. Kelly, Trevor G. Blease and J. Chris Dederen, Uniqema
Via the introduction of the Relative Polarity Index, the authors show that the choice of emollients in cosmetic formulations determines the total amount of skin penetration of active ingredients whereas the choice of the emulsifier determines its distribution within the skin.
Dec 23, 2005 | John I. Yablonski and Sharon E. Mancuso, Bio-Control Consultants Inc.
In order to control microbial contamination in personal care wet wipes, one must understand the substrate raw materials, the requirements of the manufacturing environment, the complexity of the product system and the specialized equipment employed in the processing and packaging operations.
Dec 13, 2005 | Vincent A.L. Wortel, Cornelis Verboom, Johann W. Wiechers, PhD, Uniqema; Marie-Claire Taelman, Sandra Leonard, Uniqema Personal Care; Tharwat Tadros, Wokingham
The authors introduce a method to use rheological properties (such as dynamic viscosity and yield stress) to describe and predict skin sensory attributes (such as cohesiveness) of cosmetic products. This is a first step in learning to use emulsion structure to predict sensory attributes.
Dec 13, 2005 | Ken Klein, Cosmetech Laboratories
Cosmetic chemists are constantly being bombarded by “new” raw materials from suppliers. We welcome this “bombardment” as it gives us the opportunity to be more creative in our formulation efforts. I think it is worthwhile to step back and look at how a formulator should evaluate a new material before deciding whether or not to use it. Let’s focus our attention on emulsifiers (one of my favorite topics).
Aug 3, 2005 | L. Silva, A.L. Tonkovich, D. Qiu, P. Neagle, K. Pagnatto and S. Perry, Velocys, Inc.; R. Lochhead, The University of Southern Mississippi
An innovative emulsification technology is demonstrated, which can be applied to surfactant-free emulsions and has the propensity for stimuli-responsive behavior. The technology can be used to allow previously difficult product formulations with shear-sensitive materials and controlled, droplet size distribution.
May 6, 2003 | Ratan K. Chaudhuri and Germain Puccetti, Rona/EM Industries Inc.
Transition metals in the skin affect the skin's pro-oxidation response to external stresses, well-known antioxidants and common chelating agents. The chemistry of transition metal-induced oxidation has implications for the development of skin care product
May 6, 2003 | James Ziming Sun, PhD, Michael C. Erickson and James W. Parr, Advanced Research Laboratories
Clear emulsion formulas can be achieved by matching refractive indexes (RI) of water phase and oil phase. The match is achieved by varying the ratio of water and glycols, as show in several skin and hair care formulas.
May 6, 2003 | T. Joseph Lin, PhD, Consulting Chemical Engineer
The quality of emulsions manufactured with low-energy emulsification can be equal or even superior to the same emulsions made by a conventional hot process if conditions are optimized.