The build-up of static electricity in the hair, and hence flyaway, can be an issue in dry air-conditioned buildings, during low humidity winter months and is often problematic during heat styling. If you want to show how your product, or hair styling device, reduces flyaway it might be interesting to measure hair static levels.

Dry hair smoothness is a key preference driver for many hair products, including shampoos and conditioners. Furthermore, restoration of dry hair smoothness is an important signal to consumers of hair damage repair. As a result, hair friction experiments are widely used in the category for performance testing of conditioning systems, and for supporting damage repair claims.

The ability to pass a brush or comb through hair with minimal snagging, tangling and friction is key to the perception of hair conditioning. If you want to know how well your products condition the hair and reduce dry or wet grooming forces, then you may want to consider performing ease-of-combing experiments.

Image analysis is used to assess the shape of heat straightened hair in the presence of elevated humidity conditions. High quality photographs show the progressive reversion of the hair shape as a result of the external stimulus.

If you are interested in how well your hair conditioning product, or styling device, is preventing hair breakage from repeated brushing or combing, then you may consider performing a repeated grooming test.

Hair that has been colored by dye products can fade as a result of various external influences (e.g. washing, heat styling, sun exposure). If you are interested in measuring how your products, or devices, affect these color changes, then you might consider performing hair color fade measurements.

Depilatory products have been used for hair removal for several hundred years. TRI Princeton now offers a method for testing the efficacy of these products for hair removal through the creation of a skin-like model with embedded hair fibers.

If you want to show how well your product improves hair shine or lustre, then you might consider performing a hair shine test.

If you want to show how your products deliver volume and body, then you might want to consider performing a tress volume test.

Our anti-pollution test for gaseous pollution uses a custom-built chamber that is able to pass an exaggerated levels of ozone pollution over the surface of the hair.

This test uses a custom-built pollution chamber that is able to deposit pollutant particles evenly, accurately and reproducibly over the surface of a number of tresses.

If you want to show how your product reduces hair drying times, or how fast your blow-drying device dries the hair versus others, then you might want to consider the speed of drying test.

For many consumers, split ends are an important indicator of hair damage. They are formed as the result of chemical processing, heat styling and combing, and arise from the loss of hair cuticle, the external ‘jacket’ that keeps the hair intact.

Image analysis is used to assess the longevity of hair curls in the presence of elevated humidity conditions. High quality photographs show the curl integrity as a function of time.

Our UV protection studies use an instrument to artificially expose hair to high levels of simulated sunlight.