Cosmetics and Toiletries articles from April 1996

Cosmetics and Toiletries archives from April 1996

Hair permeability.
April 1, 1996... In a new evaluation technique, a color change signals the depth to which permanent-waving solutions penetrate hair shafts Modern permanent-wave products use an initial, reducing-agent solution to rupture the hair's disulfide bonds. An...

Testing permanent waves.
April 1, 1996... Authors discuss screening methods suitable for testing permanent-wave preparations in the air cosmetics laboratory. While the practical tech niques of performing permanent waving have made great strides, theoretical investigation lags behind....

Scanning force microscopy. (includes related article)
April 1, 1996... Researchers describe how they use this technology to examine hair treated with cationic polymers Cationic polymers are important components of hair-care products, such as shampoos, mousses, hair treatments and rinses. These cationic polymers...

Carboxy silicone quaternary complexes: new conditioners for hair-care products.
April 1, 1996... Many more surfactants based upon silicone chemistry are now available than in the 1980s. Table 1 compares commercially available hydrocarbon and silicone products with similar functionalities. In this article, we discuss complexes between...

Drug delivery on skin vs. application frequency.
April 1, 1996... Experiments investigate whether a hydrocortisone cream should be applied once, twice or three times per day. How often should cosmeceuticals be applied? Data on effective doses of dermal actives can be obtained empirically, with large...

Performance technologies for hair care.
April 1, 1996... Q: What will be the most significant hair-care trends in the next 5 years? A: At Croda, we feel the most significant trends will focus on performance. Consumers will want milder products, especially for products containing reactive chemicals...