W and P/L: understanding the rheology of your flour

Two numbers sum up how a flour behaves in breadmaking: the W and the P/L. Reading them correctly avoids switching wheat when a simple formulation adjustment would be enough.

W, or baking strength, measures the work required to deform a dough to the point of rupture. It is read on the Chopin Alveograph, which inflates a bubble of hydrated dough until it bursts. The higher the W, the “stronger” the flour: it resists mixing and holds the fermentation gas. Typical benchmarks in Morocco: W 90-130 for biscuits and shortcrust pastry, W 160-220 for standard breadmaking, W 220-280 for traditional bread, W 280-350 for fermented laminated viennoiserie and frozen doughs.

P/L describes the shape of the dough. P (tenacity) is the height of the curve, L (extensibility) its length. A high P/L (> 1) gives a short, tenacious dough that shrinks back during shaping and opens poorly. A low P/L (< 0.4) gives a soft dough that collapses. For standard breadmaking the target is 0.5-0.7.

A third indicator always completes the reading: the Hagberg falling number, which measures amylase activity. A flour can have a correct W yet give a sticky crumb because its Hagberg is too low, or a pale loaf because it is too high.

At FinaAfric, the analysis does not stop at the figure. The laboratory runs the alveogram and the falling number, then a comparative trial baking (a control batch without correction, then increasing dosages) to turn the diagnosis into a concrete recommendation. In the bakery we adjust with a bread improver; in the mill, with a flour corrector that targets a stable rheological profile from one delivery to the next. The goal remains the same: flawless consistency at every bake. See also our correctors and improvers and the improvers compared.