Patent ID: 8822580

Claim:
A point-of-sale system for making custom-tinted waterborne architectural paints and stains, the system comprising an array of low volatile organic compound concentrated liquid colorants comprising pigment or dye and a vehicle, the array including at least white colorant; black colorant; and green-hued, blue-hued and red-hued primary colorants at least one of which primary colorants comprises polyalkylene glycol humectant, ethoxylated surfactant and extender pigment; wherein colorants in the array containing polyalkylene glycol humectant include amounts of such polyalkylene glycol humectant, any ethoxylated surfactant and any extender pigment such that sprinkled sand will adhere to 0.08 mm (3 mil) wet coating thickness films of each of the colorants in the array after air drying such films for at least 24 hours in a conditioned room as described in ASTM D 4946-89 (Reapproved 2003), and wherein the amounts of polyalkylene glycol humectant in such polyalkylene glycol humectant-containing colorants are such that individual dried paint films made by mixing 9 vol. % of such polyalkylene glycol humectant-containing colorants with a clear waterborne base paint containing a binder having a Tg between about 10 and 20° C. will exhibit a blocking resistance rating of 4 or more when evaluated using ASTM D 4946-89 (Reapproved 2003).