1. A method for preparing a dehydrated tissue graft, comprising the steps: a) obtaining a placenta comprising an amnion and a chorion; b) separating the amnion and the chorion from the placenta; c) washing and cleaning the amnion and/or the chorion; d) placing a first layer of amnion or chorion on a drying fixture; e) adding at least one additional layer of amnion or chorion to the first layer; and f) dehydrating the tissue graft on the drying fixture, wherein the drying fixture comprises a receiving surface, said surface containing a raised or indented asymmetric texture within a product space which has an otherwise smooth surface; wherein when at least one layer is amnion, said method does not substantially remove all of the epithelial cells on at least one layer of amnion.