The types of folds can be divided into two categories: Parallel folds and cross folds. The parallel folds run in parallel fold lines, whereas the cross folds form a cross.

We are in the year 1400: Johannes Gutenberg is born and thus also the inventor of black art. Black as night is the printing ink used for the first letterpresses in the 15th century.

"Gautschen" is a letterpress custom that can be traced back to the 16th century. After passing the final examination, the apprentice is immersed in a tub or fountain.