Also known as reflective core or core electroforming mold. It is a high precision, make the three bright prism needle (PIN) after electroforming and assembly. Used in automobile, motorcycles, motor vehicle reflecting sheet or reflective core production and optical products, final molded product requirements must comply with the current domestic GB11564, ECER3 and r48, dot, SAE, J597, JIS and regulations prescribed by the reflective brightness value. The principle of the design and manufacture of pin, mainly on the basis of Snel law and viewing angle design of polishing finish of an optical highlight needle for reflective electroforming mould core. The reflecting sheet key, in addition to injection molding equipment, mold, injection molding technology, the most important is the electroforming mold. The main production of electroforming mold core by PIN combined into customer requirements of the body surface, and then after completion of electroforming. Electroforming technology is a kind of metal deposition in the mold replication or PIN and. The naked with reflective intensity is the first-class electroforming mould core.