Most of the history of human being, with the born of civilization, can be described also through the progress of the production processes, which became, time by time more complex. The discovery, the research and the adjusting of the exploiting techniques of new resources have given their contribute to such progress. Otherwise speaking, the history of the human being can be described also as the exploitation of the
mineral resources and especially of metals. The brightness features, the easiness at working, the stainlessness and the fastness, made Gold play a special role in history with regards to other materials gifted by nature. During the years, its employ has widened into different fields: for example in the monetary field it is still considered as a reserve property; in the technological field, thanks to its good capability to conduce electricity and its stainlessness it is very much used in electronics; at the end, it is employed also in the medical field thanks to its chemical inertia and the low risks for the human health.
The field, though, where Gold has been always playing a predominant role is the one of the production of precious artefacts. From 5000 B.C, in fact, the capability to remain shining without never loosing its brightness, the particular features of malleability and the very much appreciated chromatic shades, have made of Gold, the mostly used noble material in the jewellery production.
The main aim, in the jewellery world, is all the time to reach the aesthetical perfection, by producing artefacts which are a union between beauty and quality. As it happens in all the production processes though, even in the production of golden alloys defects
can appear which draw to scrap the product or to the customer dissatisfaction. Therefore, especially in this field it is important to know and avoid defects.
The correct procedure, when a problem is faced, is to analyze it in order to take precautions to eliminate the causes and to prevent a further reappearance. This turns out to be possible only if the defect is very well identified and the causes are known.
This job is aimed to collect in a unique handbook all the notions regarding the defects typologies which can be produced in the jewellery production.