Daisy;
Per-baked crusts, AKA Par-baked crusts are just as their name implies, “baked”. While not baked to the full color development, they must be fully baked internally to support their structure. If this were not the case, they would collapse upon removal from the oven. Since the thermal death point for yeast is at about 140F, and the final setting temperature of the starch ib the flour is at about 180F, the thermal death poiunt for yeast has been well exceeded by the time the dough structure has sufficiently set to inhibit collapse upon removal from the oven. IE. par-baked crusts will not exhibit any more rise after bakin or cooling because the yeast is dead. It is not a good idea to mix fresh baked dough and par-baked dough for your pizzas. It is recommended that you either go with all par-baked crusts, or go with all fresh baked pizzas (where the pizza is assembled on a raw, unbaked dough skin, and then taken to the oven for full baking). If you need to do something to stay ahead of the orders during “slam” periods, a good trick is to pre-open the dough into skins and place them onto pizza screens that you store in the cooler on wire tree racks. Cover the racks to prevent excessive drying of the dough skins. To use these pre-opened dough skins, just bring them out of the cooler about 30-minutes before you need them, remove from the screen and finish by final stretching to full size, then place onto the baking screen, disk or prep-peel for dressing to the order, then take directly to the oven for baking. This way all of the pizzas will be made with fresh dough rather than a mix of fresh and par-baked crusts.
Tom Lehmann/The Dough Doctor