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Cosmetic effects by protection-augmented textiles

IP.com Disclosure Number: IPCOM000021092D
Publication Date: 2003-Dec-22
Document File: 5 page(s) / 111K

Publishing Venue

The IP.com Prior Art Database

Abstract

UV protective properties of fabrics are claimed to improve significantly when treated by specific UV-absorbers applied via fabric finishing or via laundry detergents. In consequence, wearing such UV-absorbance-enhanced textiles should markedly diminish UV-induced processes of the skin such as skin tanning, photo-aging and other skin alterations. Here, the UV-protective effect of a fabric with enhanced UV-protection by treatment with Tinosorb FD was directly measured on Asian volunteers during 3 months of repetitive UV-exposure and in comparison to that of the non-treated fabric and an uncovered control. Repetitive light exposure changed skin pigmentation (assessed via colorimetry), skin moisture content (via capacitance) skin elasticity (via cutometry) and smoothness and wrinkles (via laser profilometry) markedly on the non-protected area and to a lesser extent under the non-treated fabric. The UV-absorbance-enhanced fabrics protected the skin against UV-induced changes with considerable efficiency.

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Cosmetic effects by protection-augmented textiles

By anonymus

Abstract

UV protective properties of fabrics are claimed to improve significantly when treated by specific UV-absorbers applied via fabric finishing or via laundry detergents. In consequence, wearing such UV-absorbance-enhanced textiles should markedly diminish UV-induced processes of the skin such as skin tanning, photo-aging and other skin alterations. Here, the UV-protective effect of a fabric with enhanced UV-protection by treatment with Tinosorb FD was directly measured on Asian volunteers during 3 months of repetitive UV-exposure and in comparison to that of the non-treated fabric and an uncovered control.

Repetitive light exposure changed skin pigmentation (assessed via colorimetry), skin moisture content (via capacitance) skin elasticity (via cutometry) and smoothness and wrinkles (via laser profilometry) markedly on the non-protected area and to a lesser extent under the non-treated fabric. The UV-absorbance-enhanced fabrics protected the skin against UV-induced changes with considerable efficiency.

Introduction

Traditionally, skin is protected from the impact of sun exposure by proper clothing. However many fabrics provide UV-protection only to a certain extent. E.g. light cotton cloth may compare to sun protection of a sunscreen with a sun protection factor of SPF 5-10: Thus, despite the textile covering, prolonged exposure may induce pigmentation and alterations of the skin.

The UV protective properties of such fabrics can be significantly enhanced by specific UV-absorbers applied via fabric finishing or via laundry detergents. In consequence, wearing such UV-absorbance-enhanced textiles should markedly diminish UV-induced processes of the skin such as skin tanning and photo-aging. These claims have now been tested directly on human volunteers.

Materials and Methods

Textiles

Control fabric:Cotton T-shirt fabric TF 437W, tubular, 124 g/m2 (Test Fabrics Inc., Middlesex NJ-08846]) with initial UPF 4. UV-absorbance-enhanced fabric: Control fabric washed for 3 washing cycles in a Miele Deluxe Electronic W724 washing machine at 40°C-cotton programme with a laundry detergent containing 0.25% TINOSORB FD (Ciba Specialty Chemicals Inc Switzerland).

Test panel: 2 females (28, 32 years old) and 1 male volunteer (34 y) of South-East Asian origin and with a skin lightness L* between 48 and 59.

Irradiation regime: Solar simulated light, 3x/ w £ 1 MED for 12 weeks, (dose monthly adjusted) on volunteers back.

Evaluation: At the start and on week 4, 8 and 12. a) Skin colour (L*a*b* values by spectrophotometer Minolta 508i); b) Skin moisture content (skin capacitance via Corneometer ® CM 820, Courage and Khazaka); c) Skin elasticity (relative skin elasticity and tension by Cutometer ® SEM 575, Courage & Khazaka); d) Skin surface (smoothness and fold counts via contact-free profilometry by Leica Quantimet 600 system, Leica/Cambridge Instruments, D-Bensheim).

Results

Over 3 months of...