This invention relates to a 3-layer co-extruded biaxial-oriented pearly synthetic paper label used for integrally molding with bottle in mold; more particularly, it relates to a manufacturing equipment and method of said 3-layer co-extruded biaxial-oriented pearly synthetic paper label. The clip includes a main plate and a plurality of arched clasps, and the stiffener includes corresponding number of slots in a side wall for engaging with the clasps. Then, when the ink temperature falls to a second temperature, which is lower than the first temperature, a second preliminary ejection is executed. The control unit calculate a recent weight estimate and determines whether the recent weight estimate is different from the baseline weight by more than a weight threshold.