TEST TYPES
The ingredients of cosmetics must be tested microbiologically, chemically, physiology-chemical and sensorial so that safe products can be put on the market and skin health is not endangered.
The ISO 17516 regulation defines general requirements and limit values for the microbiological quality of cosmetic products. In detail, this includes the following analyses:
These analyses of cosmetics are carried out as part of release testing, batch and routine controls.
Preservation load tests are carried out as part of the development and controls of products. The results are required once for the safety assessment required by the EU Cosmetics Regulation or when products are reformulated. In a preservation stress test, also called challenge test, the product is inoculated with the microorganisms and stored under defined conditions (time, temperature, etc.). After the defined time, the microbial count and the microbial count development are determined in order to be able to make statements about microbial stability.
The microbiological parameters listed above (except for the preservative load test) should also be tested during the quality control of raw materials, because the quality of cosmetics is largely dependent on the quality of the raw materials used.
Microbiological analyses must also be carried out as part of hygiene and monitoring in the factories. Here, for example, the production water is analysed and smear and swab samples are taken
In addition to microbiological testing of cosmetic products, chemical testing is also relevant to ensure that the product can be safely marketed. For this purpose, the products are analysed for the following parameters:
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STABILITY AND COMPATIBILITY TEST accelerated method ISO 18811:2018 (4 cycles / sample) |
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1- Elevated temperatures (37, 40 or 45 degrees) |
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2- Refrigerator |
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3- Freeze thaw test |
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4- Exposed to sun light. |
Preservative Efficacy Challenge Testing
Our team conducts preservative efficacy testing according to the ISO 11930 standard - Evaluation of the antimicrobial protection of a cosmetic product) either by the reference method (manual method) or by an automated method.
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CHALLENGE TEST – PRESERVATIVE EFFICACY TEST (PET) ISO 29621 |
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Staphylococcus aureus (ISO 22718:2016) |
determined after 7, 14 and 28 days. |
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Pseudomonas aeruginosa (ISO 22717:2016) |
determined after 7, 14 and 28 days. |
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Candida albicans (ISO 18416:2015) |
determined after 7, 14 and 28 days. |
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Escherichia coli (ISO 21150:2015) |
determined after 7, 14 and 28 days. |
cosmetics are products that come into contact with the exterior (e.g. skin, hair, lips, etc.) or the teeth and mucous membranes in order to cleanse them, perfume them, change their appearance, protect them, influence body odour or keep them in good condition. The information on the packaging informs consumers about ingredients, the best-before date, etc., and thus also influences purchasing decisions.
created by
Mohamed Ghzayel .