Blaudruck (german: blueprint) is a resist-dye technique characterised by a white pattern on an indigo blue background, often featuring floral motives. Blaudruck is on the list of intangible cultural heritage in Germany. The technique came to Europe along with the indigo plant with travellers of the Dutch East India Company. The technique was commonly practised across Central Europe in the 18th and 19th century. Traditional skills and recipes are passed on within family businesses and from one generation to the next. In Germany there are only a few workshops left that produce Blaudruck.