Preservative efficacy tests were carried out for the contamination-free bands using Pseudomonas aeruginosa ATCC 9027.
This test demonstrated that 28.1% of the products tested were inadequately preserved.
It is concluded that poor microbiological quality of the preparations investigated can be attributed to either a problem inherent in the formulation of theses brands and/or poor manufacturing hygiene.
it is hoped that the implementation of good manufacturing practice in the Jordan's cosmetics industry will improve the microbiological quality of these products.