The FTC compression fixtures are large diameter, flat-bottomed cylinders, plates, or platens, used to deform solid or self-supporting samples. It is important that the surface area of the probe is greater than that of the sample throughout the test if true compressive forces are to be maintained.
Compression test methods involve compressing a sample in one direction while leaving it unrestrained in the other two. Pure compression requires that the fully deformed sample is of smaller diameter than the fixture contact surface.
These fixtures can also be used apply local compressive forces which may result in penetration or puncture of the sample. Correlation to consumer interactions which gently squeeze the product (finger feel, for example) can thus be performed.
|Typical products tested||Texture characteristics|
Texture analysis glossary