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STINGING TEST

Titlu: Assessment of the non stinging efficacy.
Obiective: To assess the non stinging efficacy of a product after single application under controlled conditions.
Planificare: Duration of the study: 3 days.
Beginning: 2 weeks upon receipt of the samples.
Report: 3 weeks after end of the study.
Metodologie: Self evaluation of the stinging intensity according to an ordinal scale.
Procedura: • Basal stinging test:
– facial sauna for 15 minutes.
– application of a 10% lactic acid aqueous solution to one nasogenian fold and application of a 0.9% sodium chloride aqueous solution to the other nasogenian fold.
– self assessment by the subjects of the stinging intensity within 5 minutes after application of each solution.
• Application of the product 2 days later.
• Post application stinging test.
• Statistical comparison of the results obtained before and after product application.