Fragment earthenware dish with sgraffito and sludge technology, dish crockery holder soil find ceramic earthenware clay engobe glaze lead glaze, hand-turned glazed sgraffito fried lemonade Fragment of dish with two pinched stand fins. Red earthenware front with yellow sludge with incised decoration and glaze. Reverse unglazed and rotted Dish is deformed archeology Rotterdam railway tunnel indigenous pottery pottery craft serving Soil discovery: rail tunnel Rotterdam.