In products like jellies and gummies, how can the gel texture (such as hardness, elasticity, brittleness, cohesiveness) be objectively evaluated?

In products like jellies and gummies, how can the gel texture (such as hardness, elasticity, brittleness, cohesiveness) be objectively evaluated?

In gel-type products like jellies and gummies, Texture Profile Analysis (TPA) is the "gold standard" for objectively evaluating texture. It translates subjective "mouthfeel" into quantifiable mechanical data, effectively avoiding the inconsistencies of manual sensory evaluation.

I. Definition of Core Indicators and Their Correlation to Mouthfeel

TPA testing simulates "chewing" through two compressions, primarily outputting the following key parameters:

Indicator	Physical Meaning	Corresponding Mouthfeel (Jelly/Gummy)
Hardness	Peak force during the first compression	Bite resistance upon entry (soft/hard)
Springiness	Ratio of deformation between the first and second compressions	Ability to return to original shape after releasing teeth (Q-弹感/bounciness)
Cohesiveness	Ratio of work done during the second compression to the first	Internal structure compactness (whether it's loose, crumbly)
Gumminess	Hardness × Cohesiveness	Viscous, chewy sensation of semi-solid gels
Fracturability	First significant break peak during the initial compression	Force required for jelly surface rupture or gummy fracture

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