The big surface area of the spiral design allows a shorter pickup time of wood character. Allowing adequate wood impact in a matter of 7 to 14 days of contact time. Toasting is a process measured in time and temperature, not color. Differences in darkness or lightness of identically toasted woods is due to natural differences in the wood before toasting, such as grain tightness and moisture, each of which falls into a range of values that meets our standard.