The function of a squeegee is to ensure contact between the screen and the substrate, allowing the screen to adapt to the surface of the substrate, transferring ink through the screen onto the substrate, and removing excess ink from the screen. The hardness value of the squeegee affects how it aligns with the substrate and determines the amount of pressure that should be applied to make the ink flow through the screen. A 65-degree squeegee is suitable for use under conditions of large screen openings and low ink viscosity. It is the best choice for printing on irregular objects and uneven printing platforms, providing a thicker ink layer and higher coverage. With a 65-degree squeegee, the ink accumulation is substantial, and the printing image has moderate fineness.