The ornamental design for embossed plastic sheet material, substantially as shown and described.
FIG. 1 is a plan view of embossed plastic sheet material showing my new
design, a design unit being contained within the rectangle defined by four
corner markings and the design being repeated as indicated by extensions
outside the defined rectangle; and
FIG. 2 is an enlarged plan view of a portion of the design unit of FIG. 1
showing the embossment at substantially actual size.