The EYE SHADOW TEST uses standard Cylinder Probes P/2 – P/6 to perform a puncture test on the pressed tablet form of eyeshadow, which is today probably the most popular form of this product.
An essential purpose of binders, and other raw ingredients, is to provide stability to the tablet to prevent it from crumbling, flaking and dusting both during shipment and use. This property is judged by measuring the hardness or ‘cake strength’ of the tablet by penetration tests.
The measurement of gel
strength and film properties is of widespread interest in the manufacture of
pharmaceutical, medical and cosmetic products.
Gel strength is a measure of the ability of a colloidal dispersion to develop and retain a gel form. Other gel
properties such as elasticity and rupture force of, for example,
pectin, gelatine, agar etc. are important in the development of such
products as coronary stents where hydrogel polymers are selected due to
their soft, rubbery nature which gives them a strong, superficial
resemblance to living, soft tissue.
