The analysis of natural textile dyeing processes, which are traditionally artisanal and predominantly sustainable, highlights the need to define standardized protocols to guarantee safety, quality, reliability and competitiveness of products placed on the European market. These systems could include internationally recognized certifications, production controls and traceability of utilized materials. The green transition part of the fashion industry promotes research and development of new techniques and materials to improve the efficiency and sustainability of natural textile dyeing processes. This is the only way to meet the needs of consumers who are increasingly aware of environmental and ethical practices in textile production. The paper presents the first results of a research work carried out in four stages: (1). Definition and classification of natural dyes according to their origin, chemical composition and application methods, without neglecting historical notes outlining their artisanal nature; (2).analysis of dyeing processes, including mordants, classified according to their toxicity; (3).identification of requirements for the standardization of natural dyeing processes; (4). Qualitative-quantitative assessment of the environmental impact. The environmental impacts are identified by considering the different process stages and categorizing inputs and outputs according to their environmental relevance. The inputs are classified into four categories: chemical, energy, water and material inputs. The outputs are divided into three groups: emissions, inputs (energy consumption, water consumption and raw material consumption) and solid waste. The results of this study led to the codification of three natural dyeing processes, a prerequisite for impact assessment and mitigation.