1Photophysics Research Centre, London South Bank University, London SE1 0AA, UK
2Biox Systems Ltd, Technopark House, 90 London Road, London SE1 6LN, UK
3Departamento de Fisica, Universidade da Beira Interior, 6200 Covilhã, Portugal
4The TEWL Calibration Project is sponsored by the UK Department of Trade and Industry. Project partners are:- EnviroDerm Services (project manager) (C L Packham and H E Packham), London South Bank University (R E Imhof, H E Packham and P Xiao), UK National Physical Laboratory (S A Bell, R M Gee and M Stevens), Biox Systems Ltd (E P Berg, R E Imhof and P Xiao), Dstl Porton Down (R P Chilcott & C H Dalton), and Gillette UK (A Stevens & N Weston)
