In addition, the limit of expansion of these gas cells is related directly to their stability, due to coalescence and the eventual loss of gas when the bubbles collapse. The rheological properties of the gas cells will therefore be important in maintaining stability against premature failure during baking, and also in relation to gas cell stabilization and gas retention during proofing, and thus to the final structure and volume of baked product (Dobraszczyk and Morgenstern, 2003). Two mechanisms are involved in the destabilization of the gas cells during proofing, disproportionation and coalescence. Disproportionation (analogous to Ostwald ripening in emulsions) involves a proposed diffusion mechanism by which CO2 migrates from smaller gas cells to larger ones. Gas cells coalescence is caused by the rupture of the thin dough films, which results in gas loss and an irregular crumb structure (Kokelaar and Prins, 1995). Textural properties of bakery products are most often measured, because of the strong correlation between crumb firmness and quality and consumer acceptance. Carson and Sun (2001) studied six types of bread and showed the existence of a strong correlation between the instrumental results (cohesiveness,springiness, adhesiveness) and those sensory analysis. The sensory evaluation development is a lengthy and costly for manufacturers, which strongly encourages correlation studies instrumental-sensory. They would provide simple instrumental measurements for the prediction of sensory descriptors.