Recent in Methods & Processes (page 11 of 12)

Comparatively Speaking: Refractive Index vs. Refraction of Light

Tony O'Lenick explains the difference between the refractive index and refraction of light to produce color. These terms can be used by the formulator to produce transparent emulsions and predict the color of emulsions, respectively.

Comparatively Speaking: GLC vs. GPC

Tony O'Lenick explains the difference between two types of chromatography: gas liquid chromatography (GLC) and gel permeation chromatography (GPC), both used to separate compounds in mixtures.

Comparatively Speaking: Density vs. Specific Gravity

Formulators often are faced with product specifications for which the tests are not chemical but physical. Oftentimes, the terms describing these physical traits are not clearly defined. Two such terms are density and specific gravity.

Peer Review and Scientific Journals: A Debate

"How do you feel about peer review in scientific journals?" Rachel Grabenhofer, editor of Cosmetics & Toiletries magazine, recently asked. Here's how readers responded.

Comparatively Speaking: Green vs. Greening Cosmetic Formulations

Tony O'Lenick explains the difference between 'green' cosmetic formulations and 'greening' cosmetic formulations, and introduces the concept of the Green Star Rating.

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Comparatively Speaking: Lowering Surface Tension in Water vs. Oil

Industry expert Tony O'Lenick discusses the differences between lowering surface tension in water vs. oil phases, noting that formulators should consider surface tension and its role when choosing ingredients for either phase.

Storage Studies of Preservative Solutions in Commonly Used Plastic Containers

In an interesting article published in this journal recently, Armstrong reviewed work done on the uptake of preservatives by plastic packaging materials, a subject of importance to both the pharmaceutical and cosmetic industries.

Comparatively Speaking: Cold- vs. Solvent- vs. Heat-Processed Oils

As the demand for natural and/or sustainable personal care products increases, the popularity of formulating with natural oils has grown. Here, Tony O'Lenick illustrates how choosing the right oil process method can yield a different result for the formulator.

Comparatively Speaking: Evaporation vs. Boiling

Industry expert Tony O'Lenick explains the difference between two types of vaporization: evaporation and boiling, for the benefit of novice formulators.

Recycled Hair Being Used for Oil Spill Cleanup

Human hair swatches are frequently used in the hair care industry to test product efficacy and color deposition; however, after testing, they may have an additional purpose—as human hair is being collected for oil spill cleanup.

Comparatively Speaking: Naming Cosmetic Raw Materials

In this excerpt, Tony O'Lenick looks to Perry Romanowski to explain how cosmetic raw materials are named for the benefit of novice formulators.

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