Patent ID: 8557152

Claim:
A method of making a flooring element, the method a) including a first set of abrasion resistant particles in a filler material, said first set of abrasion resistant particles having a density that is greater than a density of a polymerizable resin such that said first set of abrasion resistant particles moves to a lower portion of a volume of said mixture during said step d) of treating said mixture to define a first region; b) including a second set of abrasion resistant particles in said filler material, said first set of abrasion resistant particles having a density that is higher than that of said second set of abrasion resistant particles; c) adding a first layer of a mixture of said polymerizable resin, a hardener, and said filler material including abrasion resistant particles to a mold prior to polymerization of the mixture; d) treating said mixture so that there is movement of said abrasion resistant particles to define at least said first and a second region of said mixture, wherein said first region has a concentration of abrasion resistant particles which is greater than that of said second region; and e) polymerizing said first layer wherein prior to completion of said step e) of polymerizing and after said step c) of adding a first layer including said second set of abrasion resistant particles in said mixture, performing the step of e1) adding a third set of abrasion resistant particles to said mold, said step of adding said third set including defining a third region of said mixture, said third region having a concentration of said third set of abrasion resistant particles that is greater than that of said second region.