This booklet is one of Allgemeine's free-of-charge 'bestsellers'. It is now revised and updated, and reprinted in the 5 th edition:

• Technical data for solders and jewellery alloys
• Annealing and hardening of jewellery alloys
• Range of applications for jewellery alloys
• Optimum applications for flux and pickling agents
• Tables: specific weights of precious metals and conversion factors
• Gases in the goldsmith workshop
• Formulas
• etc.