Use this URL to cite or link to this record in EThOS:
Title: Development of a photoactivity test for inorganic sunscreens
Author: Guest, Patrick
Awarding Body: Keele University
Current Institution: Keele University
Date of Award: 2001
Availability of Full Text:
Access from EThOS:
In recent years inorganic sunscreens have become much used especially for fair skinned people and children where high sun protection factors are desirable. The major pigment used is titanium dioxide and the other pigment used is zinc oxide. For cosmetic acceptability these are used as ultra-fine dispersions and re-coated in various ways to minimise unwanted photoactivity. However, methods of assessing the photoactivity of such inorganic sunscreen dispersions are far from satisfactory and those that are available only assess the photo-oxidative capacity of the sunscreen. In this work new tests have been developed which assess the photo-reductive capacity of Ti02 and ZnO. These tests have been established so that they use simple equipment and are suitable for use in an industrial based quality control laboratory.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available