FORMULATION AND PROTOTYPE
DEVELOPMENT, PRELIMINARY TESTING
AND PROFESSIONAL MANUFACTURING
OF YOUR OWN PRIVATE LABEL
COSMETICS
Index — explore what we do
EXPERT FORMULATION, PROTOTYPING, TESTING AND MANUFACTURING OF COSMETIC PRODUCTS FOR YOUR OWN BRAND
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Labderma — laboratory journal13th of September, 202646.05°N · 14.51°E · Ljubljana, SI · Est. 2024
Stability
— the product over time
Stability testing for cosmetic products
A structured assessment of how a cosmetic formulation changes over time and under defined stress conditions, supporting shelf-life justification and packaging compatibility.
Parameters
What we monitor
The relevant parameters depend on the product and may include appearance, colour, odour, pH, viscosity, homogeneity and phase separation. The protocol and observation points are selected according to the formulation, packaging and intended use.
Packaging
Packaging compatibility matters
The packaging material, closure, permeability and dispensing system can affect water loss, oxidation, preservative performance and other properties of the formulation. For that reason, part of the stability programme should normally be performed in the intended final packaging where practical.
Framework
ISO/TR 18811
ISO/TR 18811 provides a technical framework for designing cosmetic stability studies. It does not prescribe one universal test programme for every cosmetic product, so the protocol must be justified for the specific formulation.
Questions
What clients ask most
Does a stability test determine shelf life on its own?
No. Stability data are an important part of the justification, but they are considered together with the formulation, packaging, microbiological data and safety assessment.
Next step
Write to us
Ask about stability testing
Send us the formulation, product type and intended packaging. We can then define an appropriate stability-testing approach. Related: PIF and CPSR · Challenge test · Cosmetics packaging