Bowing is quite common in long boards because as the fibers on the topside of a board dry faster due to their exposure to air, the bottom side fibers dry slower and thus the board contracts on both ends into a sort of archer’s bow shape. Crook is another type of gradual warping that effects an entire board, but the difference is that it occurs when on edge has dried faster than the others and has thus warped the board to the side. Kink, cup and twist warping patterns are the result of various combinations of the two previously described effects. All of these can have detrimental effects on the alignments of cabinet doors and drawers.