effect tests
2015-05-21 1075 Comments:0  
Sufficient amounts of the cosmetic product must be applied to the cosmetictextile – and transferred to the skin in large enough quantity to ensure that cosmetic benefits are possible.

Sufficient amounts of the cosmetic product must be applied to the cosmetictextile – and transferred to the skin in large enough quantity to ensure that cosmetic benefits are possible. 

In order to ascertain whether transfer from textiles to the skin was taking place, twenty human volunteers were asked to wear a model cotton sleeve treated with microcapsules containing squalane and vitamin E acetate. After five and eight hours the transferred substances were extracted from the skin surface of ten volunteers per time point, using ethanol as a solvent. The results demonstrated that the cosmetic ingredients were in fact being transferred. It really does effect on our skin body.

Cosmetic performance claims are demonstrated via a variety of different approaches and guidance documents have been published, for example by COLIPA. In general, claim types can be differentiated into two major classes – objective and subjective claims. Over the past two decades a number of biophysical methods have evolved to objectively measure skin attributes, and which are now routinely used for claim substantiation, for example corneometry to assess skin surface hydration. Subjective claims are often assessed via questionnaires. 

To ascertain whether wearing a cosmetictextile can convey cosmetic benefits to the skin, in this case improved skin hydration (moisturizing), a study with 20 female volunteers with dry to very dry skin was conducted at an independent test institute. The volunteers were asked to wear an untreated stocking on one leg and a stocking treated with a moisturizing finish  on the other, for eight hours a day over 12 days. The subjects were instructed to hand-wash the stockings daily. With the exception of days five and ten, a statistically significant increase in skin hydration was observed on the treated side. The greatest increase was observed after one day of wear and gradually decreased over the study period, which would coincide with a gradual depletion of the cosmetic from the stocking over the observation period. It  is a very gradual process of transferring.

 

Consumer preferences can also be evaluated via questionnaires. Jeans treated with a finish aimed at improving the outer appearance of cellulite  were tested in a home use test. Each of the 160 participants was given two treated jeans made from 97 % cotton and 3 % elastane and wore the jeans for 6 weeks - at least five days per week and eight hours per day. The jeans were washed in a washing machine using a detergent for delicates, and air dried. After four to six weeks of wear 74 to 78 % of the participants found the jeans pleasant to wear; application of the cosmetic via cosmetictextile was perceived as being easier than a conventional cosmetic cream application by 93 % of the participants, a slight to strong improvement in the state of the thighs and their appearance was perceived by 69 to 74 % after four/six weeks of wear.

 

 
 
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