Test Method: Strain-Controlled Compression
Gummy candy is a soft food, suited to compression under strain control (a percentage-deformation target). The sample sits at the center of the test stage, and the probe compresses it to the set strain while the full force–displacement curve is recorded.
A Ø 36 mm cylindrical probe (CY36) is recommended, matching the configuration listed for gummy candy in RapidTA's application data.
Parameter Settings
The parameters below should be set by sample size and test purpose. Run a pilot test first, then fix them as the formal test conditions.
- Test speed: [TBD]
- Target strain: [TBD]
- Trigger force: [TBD]
- Sample size and temperature: [TBD]
Reading the Data: Hardness and Springiness
Hardness is the positive peak of the compression curve, the maximum force resisting compression. A higher hardness usually means a firmer bite.
Springiness is the rebound ratio after the probe's return stroke, reflecting how well the candy returns to its original shape. Low springiness shows up as a sticky, slack bite.
Frequently Asked Questions
- Why use strain control instead of distance control for gummy candy?
- Strain control targets a percentage, so samples of different sizes can be compared at the same relative deformation — suited to soft foods. Distance control stops at a fixed displacement, which suits harder samples of consistent size better.
- What sample preparation does a gummy candy test need?
- Fix the sample size, resting time and temperature, and record them in the report. If stored candy isn't brought back to temperature consistently, hardness will vary noticeably. Set the exact conditions to your experimental design; the parameter recommendations above are marked [TBD].
Further Reading
Related Test Actions
Related Test Samples