CROMìA — Tattoo Fundamentals is the introductory volume dedicated to the technical and methodological foundations of artistic-aesthetic tattooing and dermopigmentation. It is designed for those who are starting out, as well as for professionals who wish to structure their work according to a solid, repeatable, and safe standard. This volume defines a clear professional approach in which skin assessment, trauma control, instrument selection, and pigment management become operational skills. Through technical yet accessible language, CROMìA guides the practitioner in building a method: from the organization of the working field — hygiene, asepsis, and traceability — to the understanding of needles and configurations; from the optical behavior of color in the skin to the management of variables that may compromise results, such as reactive skin, scar outcomes, pre-existing work, and operational margin. The volume also includes a section dedicated to the most relevant skin conditions and to the situations in which it is essential to recognize limits, protect the client, and safeguard the professional, while maintaining collaboration with healthcare figures whenever indicated. CROMìA is a collection built on one principle: excellence is born from repeatability. This manual is the foundation for those who want to transform daily practice into a system, improve the quality of technical execution, and consolidate a contemporary, conscious, and defensible professionalism.