Black and green tin-glazed pottery is known to be one of the true majolica manufactures at Barcelona during the end of the medieval period. This pottery means the evolution of a production process for achieving opacified decorated tableware, started one century before, with the elaboration of what is known as archaic majolica. Black and green implies a new high variety of decorative motifs made in black, or in black and green, on a white opacified glaze prepared following a recipe adapted by potters to prepare the base glaze and to applicate the pigments for attaining the decorative patterns, characteristics of this period.

Originally thought as imported from Valencia workshops, the development of different archaeometric projects conducted in the core of the ARQUB team, allows verifying an origin in Barcelona. Besides, recent excavations dated back to the 14th century provided a great number of Black and green sherds with new decorative motifs unknown up to now, allowing the specialists to create a new corpus of decorative patterns, which is still in progress. Based on insights obtained from those first archaeometric studies and considering the advances on the classification of decorations based on archaeological arguments, a new sample of Black and green sherds was selected for this study. The aim was to observe whether decoration and technique of manufacture could in some way be related, understanding the technical process as the selection and application of raw materials and the firing temperature at which this pottery was made.

To achieve these objectives, X-ray fluorescence (XRF), X-ray diffraction (XRD), and Scanning Electronic Microscopy (SEM-EDX) have been performed. The results allow verifying the groups previously defined and to identify a new chemical group, probably related to a recipe for the body-paste different from the others. On the other hand, the study enabled us to observe differences also in know-how in firing, which in some cases seem to be connected with differences in the decorative motives, suggesting, perhaps, the discrimination of artisans.

众所周知，黑色和绿色的锡釉陶器是中世纪末期巴塞罗那真正的珐琅制品之一。这种陶器意味着实现不透明装饰餐具的生产过程的演变，始于一个世纪前，精心制作了所谓的古代珐琅器。黑色和绿色意味着用黑色或黑色和绿色在白色不透明釉料上制作的各种新的装饰图案，该釉料按照陶工调整的配方制备，用于制备底釉并涂抹颜料以获得装饰图案这一时期的。

最初被认为是从瓦伦西亚工作室引进的，在 ARQUB 团队的核心进行的不同考古测量项目的开发，可以验证巴塞罗那的起源。此外，最近可追溯到 14 世纪的发掘提供了大量具有迄今为止未知的新装饰图案的黑色和绿色碎片，使专家能够创造一个新的装饰图案语料库，该语料库仍在进行中。基于从最初的考古学研究中获得的见解，并考虑到基于考古学论据对装饰品分类的进展，本研究选择了一个新的黑色和绿色碎片样本。目的是观察装饰和制造技术是否可以以某种方式相关，

为了实现这些目标，已经进行了 X 射线荧光 (XRF)、X 射线衍射 (XRD) 和扫描电子显微镜 (SEM-EDX)。结果允许验证先前定义的组并识别新的化学组，可能与不同于其他的身体膏配方有关。另一方面，这项研究使我们能够观察到烧制技术的差异，在某些情况下，这似乎与装饰动机的差异有关，这可能表明工匠的歧视。