Etching has been used for nearly 500 years as a printmaking technique where ink is forced through lines and grooves carved into a copper or plastic plate. Originally used to decorate armor, etching involves using a needle to incise a design into a surface, then applying ink which is transferred to paper under pressure to create a print. Drypoint etching is the modern equivalent where a needle is used to scratch a design directly into a surface. The document then provides step-by-step instructions for creating an etching on plastic using various mark-making and masking techniques before printing. Once printed, additional details can be added using watercolors or brusho.