Paul Cornwell

Cosmetic Science Europe


Paul is based in the UK and acts as the main contact between the Institute and clients in the UK and Europe. Paul’s technical expertise is focussed on product evaluation, instrumental measurement techniques and on formulation design, particularly in cosmetic skin and hair care products.  He has over 23 years of industrial experience in claim support testing, innovation and product development at Unilever and PZ Cussons.
Paul qualified as a pharmacist in 1989 and gained a PhD in Pharmaceutical Technology in 1993.  For his PhD Paul worked with Professor Brian Barry at Bradford University on topical drug delivery and skin penetration enhancers.  For his postdoctoral research he continued to work in skin delivery with Dr Joke Bouwstra and Dr Harry Bodde at Leiden University.  Since then Paul has enjoyed a career in R&D in the cosmetics industry working at Unilever and PZ Cussons.
Over his career Paul has published many journal articles and presented at many scientific conferences.   His publications have been cited in over 530 academic papers (data from  In industry, Paul has been involved in many successful product launches for major, international cosmetic brands such as Organics, Dove, Lux, Sunsilk, Carex, Original Source, Charles Worthington and Imperial Leather.  He has contributed to several patent applications, at least four of which have gone to the full ‘grant’ stage.
Paul lives with his wife and two daughters in Waverton, just outside Chester.   He enjoys cycling and skiing, and is a big music fan.  
19.  Cornwell, P.A., Goodwin, J. (2012)
Mildness is in the eye of the beholder;  Designing ‘mild’ personal care products
Cosmetics & Toiletries, 127(10): 706
18.  Christian, P., Winsey, N., Whatmough, M., Cornwell, P.A. (2011)
The effects of water on heat styling damage
J.Cosmet.Sci., 62(1): (15-27)
17.  Grams, E., Whitehead, L., Cornwell, P.A., Bouwstra, J.A. (2004)
Time and depth resolved visualisation of the diffusion of a lipophilic dye into the hair follicle of fresh unfixed human scalp skin.
J.Control.Rel., 98(3): 367-378.
16.  Grams, E., Whitehead, L., Cornwell, P.A., Bouwstra, J.A. (2004)
On-line visualisation of dye diffusion in fresh unfixed human skin.
Pharm.Res., 21(5): 851-889
15.  Skinner, R., Hannah, T., Devine, K., Tucker, I., Cornwell, P.A. (2003)
Effects of humidity, temperature and damage on the structural and mechanical properties of hair fibres.
Proceedings of 23rd International Federation of the Societies of Cosmetic Chemists (IFSCC) Congress, Seoul, Korea, 2003.
14.  Heywood, D.M., Vrettou, C., Wood, J., Hill, J., Casey, S., Cornwell, P.A. (2004)
Investigating the relationship between the hair fibre proteome and hair quality
Int.J.Cosmetic.Sci., 26(5): 268
13.  Heywood, D.M., Skinner, R., Cornwell, P.A. (2002)
DNA analysis of hair fibres
J.Cosmet.Sci., 54(1): 21-27
12.  Cornwell P.A., Tubek, J., van Gompel, H., Little, C.J., Wiechers, J.W. (1998)
Glyceryl monocaprylate/caprate as a moderate skin penetration enhancer.
Int.J.Pharm., 171(2), 243-255.
11.  van Hulst, M., van Gompel, H., Cornwell, P.A. (1998)
Percutaneous absorption and skin metabolism: The effects of formulation excipients on metabolism.
In: Perspectives in Percutaneous Penetration, Vol. 5a, Edited by Brain, K.R., James, V.J. and Walters, K.A., STS Publishing, Cardiff
10.  Cornwell, P.A., van Gompel, H. and Wiechers, J.W.
Maintenance of human skin viability in vitro; absorption and metabolism of benzyl alcohol in scalp skin.
Proceedings of the 4th European Symposium on Controlled Drug Delivery, Noorwijk aan Zee, The Netherlands, 3-5th April, 1996.
9.  Cornwell, P.A., Bouwstra, J.A., Gooris, G.S. and Barry, B.W. (1996)
Mode of action of terpene penetration enhancers in human skin; differential scanning calorimetry, small-angle X-ray diffraction and enhancer uptake studies.
Int. J. Pharm., 127: 9-26.
8.  Cornwell, P.A. and Barry, B.W. (1994)
Electrical properties of human skin in vitro; effects of hydration and terpene penetration enhancers. 
Proceed. Intern. Symp. Control. Rel. Bioact. Mater.,  21: 371-372.
7.  Cornwell, P.A., Bouwstra, J.A. and Barry, B.W. (1994)
Wide-angle X-ray diffraction of human stratum corneum: Effects of hydration and terpene enhancer treatment.
J. Pharm. Pharmacol., 46: 938-950.
6.  Cornwell, P.A. and Barry, B.W. (1994)
Sesquiterpene components of volatile oils as skin penetration enhancers for the hydrophilic permeant 5-fluorouracil.
J. Pharm. Pharmacol., 46: 261-269.
5.  Cornwell, P.A., Barry, B.W., Bouwstra, J.A. and Gooris, G.S. (1993)
Small-angle X-ray diffraction investigations of terpene enhancer actions on the lipid barrier in human skin.
In: Prediction of Percutaneous Penetration. (Brain, K.R., James, V.J. and Walters, K.A., Eds.) Vol. 3b, STS Publishing, Cardiff, pp 18-26.
4.  Cornwell, P.A. and Barry, B.W. (1993)
The routes of penetration of ions and 5-fluorouracil across human skin and the mechanisms of action of terpene skin penetration enhancers.
Int. J. Pharm., 94: 189-194.
3.  Williams, A.C., Cornwell, P.A., Barry, B.W. (1992)
On the non-Gaussian distribution of human skin permeabilities.
Int.J.Pharm., 86: 69-77.
2.  Cornwell, P.A. and Barry, B.W. (1992)
The effects of a series of homologus terpene alcohols on the lipid structure of human stratum corneum as assessed by differential scanning calorimetry.
In: Prediction of Percutaneous Penetration. (Scott, R.C., Guy, R.H., Hadgraft, J. and Boddé, H.E., Eds.) Vol 2, IBC Technical Services, 394-400.
1.  Cornwell, P.A. and Barry, B.W. (1991) 
The mechanisms of action of sesquiterpene skin penetration enhancers.
J. Pharm. Pharmacol., 43: 56P

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