In letterpress printing, a metal plate, typically made of steel, copper, or zinc, is used as the primary printing surface. The design or text is engraved or etched into the plate, creating raised areas that transfer ink onto paper during the printing process.

The primary function of a printing press in letterpress printing is to apply pressure to the paper, ensuring that the ink from the raised areas of the printing surface is transferred onto the paper, resulting in a clear and legible print.

Oil-based ink is a widely used type of ink in letterpress printing. It provides good adhesion to the printing surface, dries relatively quickly, and produces sharp and vibrant prints.

A proof press is a specialized press used in letterpress printing to test the quality of a printing plate before proceeding with a full print run. It allows printers to make adjustments to the plate or printing process to ensure optimal results.

In letterpress printing, the process of transferring ink from the raised areas of the printing surface to the paper is known as 'impression'. This is achieved by applying pressure to the paper through a printing press, causing the ink to be transferred onto the paper.

A chase is a metal frame used in letterpress printing to hold the printing plate securely in place on the printing press. It ensures that the plate remains aligned and stable during the printing process.

In letterpress printing, the raised areas on a printing plate that transfer ink onto the paper are referred to as 'relief'. These raised areas are created through engraving, etching, or other techniques, and they determine the design or text that is printed.

A tympan is a sheet of material, typically made of paper or fabric, that is placed on the printing press to hold the paper in place during the printing process. It ensures that the paper is properly aligned and receives an even impression from the printing plate.

Make-ready is the process of preparing a printing plate for use in letterpress printing. It involves adjusting the plate, the press, and other factors to ensure that the printing process produces high-quality results.

A frisket is a sheet of material, typically made of paper or acetate, that is used in letterpress printing to protect areas of the paper from ink. It is placed over the paper before printing, allowing ink to be transferred only to the desired areas.

Wash-up is the process of cleaning a printing plate after use in letterpress printing. It involves removing ink and other materials from the plate to prepare it for storage or future use.

A roller in letterpress printing is used to distribute ink evenly across the printing plate. It is typically made of a soft material, such as rubber or gelatin, and is inked up before being rolled over the plate to transfer the ink to the raised areas.

Composition is the process of creating a master copy of a design or text for use in letterpress printing. It involves arranging and securing individual pieces of type or other printing elements on a composing stick or other device to form the desired layout.

A galley in letterpress printing is a shallow tray or container used to hold composed type or other printing elements before they are transferred to a printing plate or press. It allows printers to organize and proofread the composed material before proceeding with the printing process.

The final printed product in letterpress printing is referred to as a 'print'. It is the result of transferring ink from the raised areas of the printing plate onto paper using a printing press.