Particulate coating method

Claim 1

The method of producing a coated surface which comprises the steps of grinding a natural stone to particle sizes of less than 1 mm., separating substantially all the smaller particles of the ground material of size less than 100 Mu from the larger particles of size greater than 100 Mu , remixing with at least a size range of the larger particles from 100 Mu upwards, a proportion of the particles of less than 100 Mu to produce a mixture containing 20 to 30 percent by weight of the smaller particles, applying at Least one adhesive layer to the surface, depositing onto the adhesive layer to be secured thereby a layer of the said particle mixture to produce a substantially continuous adherent surface layer of contiguous particles obscuring the adhesive from view, and removing surplus nonadherent particles.

Claim 3

The method of producing a coated metal surface which comprises the steps of grinding a natural stone to particle sizes of less than 1 mm., separating substantially all the smaller particles of the ground material of size less than 100 Mu from the larger particles of size greater than 100 Mu , remixing with at least a size range of the larger particles from 100 Mu upwards, a proportion of the particles of less than 100 Mu to produce a mixture containing 20 to 30 percent by weight of the smaller particles, forming a coating of vitreous enamel on the metal, then applying to the enamel a layer of vitreous enamel forming materials, applying a layer of the said particle mixture to the layer of vitreous enamel forming materials, and then firing the layer of vitreous enamel forming materials to bond the particles to the enamel coating while leaving the particles projecting from the bonding layer.