Search results for "Hair dyes"

Actives for Hair Products (Excluding Hair Dyes)

2007

Ultrastructural alterations and environmental exposure influence the opiate concentrations in hair of drug addicts

1995

Hair samples were taken at autopsy from the head of 1 male and 1 female subject both known as drug abusers. Some of the strands were bleached by in-vitro cosmetic treatment. The bleached hair as well as the original hair samples were partly exposed to water or soil prior to further investigations and drug monitoring. The exposure times were 4 weeks or 6 months for water and 6 months for soil. The hair fibers were examined by transmission electron microscope (TEM) and by scanning electron microscope (SEM) investigations. The electron microscope studies confirmed that all experimental conditions had produced morphological alterations in the hair fibers. After exposure to water or to soil for …

Hair Dyes in Cosmetics. Regulatory Aspects and Analytical Methods

2007

Abstract Fragrance ingredients are extensively used in perfumes and other cosmetics, providing us with a pleasant scent. However, different fragrance chemicals and other chemicals present in perfume composition have been shown to cause undesirable side effects. The EC Regulation prohibits and limits the contents of some of them in cosmetics. Other international organizations, such as the International Fragrance Association and the Research Institute for Fragrance Materials, work on the safety of fragrance chemicals and release reports on the convenience or not of using certain fragrance chemicals in cosmetics, depending on their toxicity. This chapter is focussed on the determination of fra…