Patent ID: 6101874
Filing Date: 2000-08-15
Classification: G01N

Abstract:
A non destructive method for measuring the ratio of gold in carats or the ratio of other components in a cast material having the following steps:a. casting of ""standard"" reference samples, for each type of gold, comprising:a1. building a casting structure with or without a porosity trap;a2. casting gold from tile type specified within the structure and the casting presents a standard;b. measuring the ratio data in carat, of the standard, comprising:b1. testing a portion of the said casting of the standard by the standard gold testing method;b2. receiving the ratio data of the standard tested and this data is the gold ratio of the standard in carats--CT;c. measuring of the specific weight of the standard comprising:c1. weighing of the standard when it is in the air;c2. weighing of the standard by second weighing when it is submerged in liquid, by the method of ""Repeated Flooding"";c3. calculation of the specific weight of the standard;d. calculating the specific weights of the alloy in the standard using either alloy specification or according to the formula ##EQU4## when L--is the specific weight of the alloy, A.sub.u --is the specific weight of pure gold, D.sub.m --is the specific weight of the standard, CT.sub.m --is the gold ratio of the standard in carats;e. measuring the specific weight of the measured body by way of the specific weight of the standard; andf. calculating the gold ratio in the measured body by means of the standard data from the same type of gold as the measured body and the formula ##EQU5## when CT.sub.s --is the gold ratio of the measured body in carats, A.sub.u --is the specific weight of pure gold, L--is the specific weight of the alloy in the standard from the same type of gold as the measured body and D.sub.s --is the specific weight of the measured body.