A novel maize variety designated PHR1R and seed, plants and plant parts thereof. The present invention is urethane resin particles for slush mold which contain a urethane resin and an additive, wherein the particles have a shape factor SF1 of 101 to 200, a shape factor SF2 of 120 to 240, and a central particle diameter of 20 to 500 \u03bcm. The lens according to the invention does especially prevent the reflection of the UV radiation produced by light sources located behind the wearer. Water is then injected into the reactor in controlled amounts to hydrolyze the borohydride particles thus, producing hydrogen gas and solid-phase by-products. The hypochlorite admixture solution may contain at least 0. The second region is then masked while the first region is etched away.