In Sep. Hot Sales, 120 pcs etching zinc plates and two barrels corrosion additives are packed for delivering to our customer in A. High quality etching magnesium plates with good packaging.Acid etching, also known as copper chloride acid etching system, is usually used for single-sided etching, inne

There are many methods of Relief Printing. It can be selenium from a photographic negative on a metal sheet and corroded to form a relief printing plate, or a photographic negative can be sun-dried on a photosensitive resin to form a relief printing plate; and an electronic engraving machine can be