Recent in Methods & Processes (page 14 of 14)

Gold Nanoparticles Reduce Toxic Waste in Cosmetic, Perfume Production

Perfume, paint and cosmetics can be manufactured without producing as much toxic waste, according to recent report.

Formulating for Efficacy

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.

Personal Care Wipes: Manufacturing Practices & Microbiological Control

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.

Linking Sensory and Rheology Characteristics

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.

Evaluating a “New” Emulsifier

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).

Enabling Advanced Emulsions in Microchannel Architecture

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.

Transition Metal-Induced Oxidation: Implications for Skin Care Products

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

Refractive Index Matching: Principles and Cosmetic Applications

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.

Low-Energy Emulsification: Beyond Energy Conversation

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.

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