Then they apply a primer to the helmets, evenly spraying it on. Apart from adding stiffness, this step is largely taken to seal the pores of the paper to make it easier to proceed with the next step of "lining," which makes the object come alive.
接著用油漆打底，均勻噴灑底漆，除了可以增加紙板硬度外，最主要的功能是將紙板的毛細孔完全阻塞，以便進行具畫龍點睛效果的「梭線」。