Resilience

Picture 1. Fresh vs Stale Bread shows the importance of resilience

Bread Resilience

What does resilience mean in bread texture?

The resilience of bread deteriorate over time. Most bakers use the hinge test to determine whether a slice of bread is resilient. Fresh bread does not crack when the hinge test is performed, while stale bread completely breaks into half (see Picture 1.).

How do you measure Resilience?

On a sensory panel, the resilience or hinge test is tested by panelists on a slice of bread. Using the symmetrical center, the slice of bread is folded into half as seen in Picture 1. The amount of fissure or cracking at the fold would indicate resilience of that slice of bread.  The bigger the fissure or crack, the less resilient the slice of bread.

TPA Bread

Picture 2. Slices of bread being analyzed on a texture analyzer

TPA Bread

Picture 3. A 2″ Acrylic probe is used to compress bread to 10mm.

On a texture analyzer test (Picture 2 & 3), resilience can be quantified using the Texture Profile Analysis (TPA). The TPA is a two cycle compression test.  Resilience can be calculated by Recoverable work done (Figure 1.), divided by hardness work done (Figure 2.), as seen below. This is a value calculated and given by the texture analyzer.

Resilience curve

Figure 1. Recoverable work done

Resilience curve

Figure 2. Hardness work done