Figure 1: Spreadability (plasticity) Figure-STUDIES TOWARDS OBTAINING A PHOTOPROTECTIVE DERMO-COSMETIC COMPLEX PRODUCT WITH NATURAL EXTRACTS OF INORGANIC AND ORGANIC SUBSTANCES

The physical and chemical methods used to characterize the row
materials and the ¯nal products are as following:
² to ¯nd out the amount of inorganic substances (with screening role) the
samples were incinerated for two hours at 800±C;
² the quantity of organic substance (with the UV ¯ltering role) was deter-
mined by an UV-VIS spectrophotometric method;
² vitamins identi¯cation was done according to the European Pharma-
copoeia VI-th edition;
² the photoprotective ability was tested by applying a standard amount of
emulsion on a synthetic skin device (0,2g=cm2);
² to test the microbial stability were applied the European Pharmacopoeia
VI-th edition stipulations;
² to estimate the compatibility with the human skin a standard quantity
of sample (0,2g=cm2) was laid under an occlusive patch.