If it is made of acrylic, it is usually laser engraved first, and then the product is cut after grinding the bevel.

The scale markings and the trademark on the stainless steel ruler are not printed, but corroded. Because it is just printed on, it will be worn off after a short time. So it must be etched on.

The production of stainless steel ruler is to uniformly print the scale and trademark on a large stainless steel plate, uniformly corrode it, and then cut or punch it into a single ruler. Printing graphics and text can be done by screen printing. Of course, photo-resistant etching ink can also be used as a mask, and the negative can be directly exposed to the plate and then developed, so that a ruler with finer lines can be produced.