Most home bakers laminate dough by folding a butter block into dough and repeating. Professional bakers do something almost entirely different: they build the dough and butter to identical temperatures (around 68°F for dough, 70°F for butter), then use a technique called "three-fold" instead of the typical "letter fold." A three-fold divides the dough into three equal sections, folding the outside thirds inward. This creates nine distinct layers instead of six. Temperature Is Everything Home kitchens rarely maintain precise dough temperature. Warmth causes butter to soften unevenly; cold makes it shatter and separate from the dough. Professional lamination uses a rolling pin with adjustable height, ensuring consistent thickness on every pass. After each fold, the dough rests between 30-45 minutes in a precisely controlled cooler. The result of proper lamination is visible: each layer puffs independently, creating what's called "shatter" in the pastry trade—the brittle, flaky texture of a truly excellent croissant. Home lamination often produces dense layers that stay glued together. "People think lamination is about ingredients," explains pastry chef Lucia Ferretti. "It's about patience and precision. You can't rush temperature changes." Most home cooks fail because they attempt lamination in a warm kitchen without resting periods, collapsing the whole structure.