Methods for fabrication of and highway marking using agglomerated retroreflective beads

A method for fabricating agglomerated retroreflective glass media of generally spherical configuration having a plurality of larger central generally spherical globular glass members and a plurality of smaller generally spherical globular glass members, each of the larger members having a plurality of the smaller members connected thereto by adhesive and covering the larger member, for highway marking, comprising:

• a. assembling a supply of largely spherical essentially clear larger globular glass members;
• b. adding silane and water to the supply of larger members;
• c. blending the silane, water and larger members into a mixture;
• d. blending pigment into the mixture;
• e. blending resin into the mixture;
• f. blending a crosslinker into the mixture;
• g. blending a second silane into the mixture;
• h. blending the smaller glass members into the mixture until the larger globular glass members are substantially covered by the smaller members and the smaller members are secured to the larger members by an adhesive layer comprising the first silane, the pigment, the resin, the crosslinker, and the second silane.