Inorganic Surface Coatings – Definitions and Practices for Appearance. ISO 16348:2003 defines terms and guidelines for evaluating the appearance of inorganic surface coatings, focusing on their visual properties. The standard describes how to assess parameters such as color, gloss, texture, and uniformity, as well as how these factors affect the aesthetic and functional quality of coatings. By standardizing these assessment criteria, uniformity in the appearance of coated products can be achieved, which is essential for both aesthetic and practical applications. The standard also provides recommendations for documenting and reporting evaluation results, facilitating communication between manufacturers and customers.