This article exposes the tools of cooperative learning and brainstorming as a didactic strategy, in which teamwork, diversity, interaction between the students and feedback between them are promoted as the main source of learning. In professions related to the conservation and restoration of cultural assets, we work as a team, thus is fundamental that the students' training prepares them for this work reality and enables them to be part of and lead these teams, fostering cross-cutting skills such as communication effective, critical thinking, application and practical thinking among others. We will present the case of a teaching experience, in which cooperative learning is a fundamental tool to solve one of the practices of the subject “Introduction to the Conservation and Restoration of golds and polychromies” of the Degree in Conservation and Restoration of Cultural Assets in Universitat Politècnica de València. The practice consists in the identification of manufacturing techniques, and focuses on the subsequent professionalization and comprehensive training of students. The results obtained from it show how peer learning is an effective, dynamic strategy with infinite possibilities.

The article presents a literature review of three Chinese manuscripts containing natural dyes recipes and three containing synthetic dyes from the Ming Dynasty to the Republican Period. The manuscripts mentioned were exclusively used as references and sources. Four databases were used to access the original documents, then, a translation from old mandarin to Spanish was made. For natural dyes, the results show four dyestuffs were commonly used to produce colors, sappanwood (Caesalpinia sappan L.), followed by safflower (Carthamus tinctorius L.), indigo (Indigofera tinctoria L.), and sophora (S. japonicum L.). While the synthetic dyes exported to or produced in China were mainly bluish, greenish, and violet probably because they were difficult to obtain from natural ones. The literature review of the dyes and their recipes can be a key factor in any art history or conservation study, improving the understanding of how the colors were achieved and as complementary information for analytical analyses. It provides useful details that contribute to the preservation of Chinese dye history on silk heritage.

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En este artículo se aborda el estudio de un bordado chino en seda del siglo XX, el tema es Cien Pájaros adorando al Fénix. A partir del examen técnico-artístico se logró determinar su estilo como Chaozhou, la elaboración del bordado, sus puntadas, y las características técnicas del tejido de soporte. Se realizó un detallado análisis microscópico, solidez de tintes, pH y colorimetría, a fin de identificar los materiales componentes del bordado, así como establecer su paleta cromática y cuantificar la pérdida de color entre el anverso y reverso. El análisis mediante Espectrometría Infrarroja por Transformada de Fourier (FTIR) determinó el avanzado grado de deterioro del tejido de seda y de los hilos del bordado y de sus colorantes. Con todo ello se pudo constatar el grave estado de deterioro de los materiales que obliga a plantear una propuesta de intervención conservativa adecuada para salvaguardar este preciado bien cultural, ya que es un ejemplo de un tipo de obra de gran interés por el contexto histórico y cultural al que pertenece.