Retroreflective composition and method of applying same

Claim 1

A PROCESS FOR MAKING A SOLID SURFACE RETROREFLECTTIVE WHICH COMPRISES APPLYING THERETO A LAYER OF MARKING COMPOSITION THICKNESS BETWEEN ABOUT 1/32 AND 1/2 INCH AT A TEMPERATURE BETWEEN ABOUT 300*F. AND 450*F., SAID MARKING COMPOSITION CONSISTING ESSENTIAL OF FROM ABOUT 15 TO 35 PERCENT OF A NORMALLY SOLID NON-DRYING THERMOPLASTIC BINDER SOFTENING TO A FLOWABLE STATE ON HEATING AND HARDENING FROM SUCH FLOWABBLE STATE SOLELY BY COOLING, FROM ABOUT 0 TO 15 PERCENT OF A PIGMENT AND FROM ABOUT 20 TO 70 PERCENT OF TRANSPARENT RETROREFLECTING BEADS HAVING A SOFTENING POINT SUBSTANTIALLY ABOVE THAT OF THE BINDER, THE REMAINDER OF THE COMPOSITION NOT EXCEEDING ABOUT 30% BEING FILLER, SAID BINDER CONSISTING ESSENTIALLY OF A MIXTURE OF SUBSTANTIAL PROPORTIONS OF A NON-DRYING THERMOPLASTIC RESIN WHICH IS NORMALLY SOLID AT ROOM TEMPERTURE AND OF A NON-DRYING THERMOPLASTIC RESIN OF SUBSTANTIALLY LOWER SOFTENING POINT THAN SAID NORMALLY SOLID RESIN.