For the past 200 years, Petersen Tegl, a family-owned brick company in Denmark, has been passing down centuries-old brickmaking traditions from generation to generation. Today, Petersen still manufactures its bricks the old-fashioned way, by hand-pressing waterstruck, or very wet, clay into wooden molds and then baking them in coal-fired kilns. They may lack the uniformity and precision of their mass produced counterparts, but the bricks more than make up for it with their highly textured surfaces and gorgeous color variations.

https://architizer.com/blog/inspiration/collections/perfect-imperfections-kolumba-bricks/