Excavation of Testar del Molí, the only workshop found in the Manises‐Paterna area, revealed the existence of a fourteenth‐century ceramic workshop covering the remains of the thirteenth‐century workshop. This study is concerned with the fourteenth‐century production, and forthcoming papers will connect both epochs following the findings of current excavations. The chemical and mineralogical characterization of the ceramic production of this workshop shows the presence of three groups of ceramic pastes which could also be distinguished by, and, thus, related to, their daily use. The raw materials found in the excavation have also been mineralogically and chemically characterized, and a model of possible mixtures of raw materials has also been developed in order to determine their possible use in the manufacture of the pottery previously chara