A process for the manufacturing of a decorative surface element, which element comprises a base layer and a decorative upper surface. The brush comprises at least one soft and resilient support member, a washing brush, and a cap inserted into an opening portion of the nursing bottle with the upper end of the support member fixed and rotated to the right and to the left by a user. Next, the mask layer is etched to expose portions of the polysilicon layer, and to define a first patterned region, a second patterned region and a third patterned region located between the first and second patterned regions.