To ensure proper surface treatment, it is crucial to provide the correct file format. For silkscreen production, suitable formats include PDF, AI, SVG, and other image formats. Additionally, the specific location and size of the silkscreen graphics must be provided as per the customer's specifications to ensure accurate production. 

For laser engraving, files need to be converted from data types like PDF, AI, and SVG, or be in formats such as DWG and other CAD files. These formats are ideal because the laser must be precisely aligned to engrave the graphics accurately. Without accurate data, the laser cannot correctly engrave the size and shape of the product. 

Providing the appropriate file format is essential for achieving the desired results in both silkscreen production and laser engraving, ensuring high-quality surface treatment and precise, professional outcomes.