the present invention is the apparatus and method for producing a plastic sheet having a pattern produced in a layer therein . the plastic sheet is a single layer sheet or a multi - layer sheet . the pattern is produced by mixing two or more plastic extrudants together in a mixer . the pattern is visible in the layer containing the two or more plastic extrudants because an at least one of the plastic extrudants is at least partially transparent . the mixer used to produce the pattern includes a housing having an end configured to expel the mixture of the two or more extrudants through a plurality of outlets . the mixer further comprises a rotatable shaft and at least one projection coupled to the shaft and rotatable with the shaft , the at least one projection configured to orient the mixture of the two or more extrudants relative to the plurality of outlets in the housing . the mixer further comprising a thrust bearing configured to couple an end of the shaft to the housing .