There is a considerable amount of scholarly work that investigates the precise workings of copper and bronze under laboratory conditions, such as the changes caused by the presence of specific elements. These studies typically are concerned with the properties of the metal, from a quantitative perspective. They rarely explore how observed changes would be noted and acted upon by, and whether they are relevant to a (prehistoric) metalworker. Contrasting, one of the core points established so far in this book is that the manner in which craftspeople appreciate their material is through its qualities, which are known to them because of their handling and sensory perception of the material. On top of this, I also made the claim that these two different types of understanding are not mutually exclusive.