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 is contained within the rectangle defined by dark
lines. As shown, the design is repeated 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.