Does Pastry have to be baked blind for dextranisation to happen?

Pastry does not necessarily have to be baked blind for dextranization to occur. Dextranization refers to the process where starches in the pastry undergo gelatinization and then retrogradation, which can happen during baking. Blind baking is often used to ensure a crisp crust and prevent sogginess, particularly for pie crusts, but the dextranization process itself can occur during any baking method as long as the pastry is exposed to heat.