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 in vertical rows as indicated by
extensions outside the defined rectangle, the design units of one
vertical row being in an offset relationship with respect to the design
units of adjacent vertical rows as indicated by the markings intermediate
the side boundaries of 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.