S.L. 46.1 Art. 2Standard of the precious metal alloy in a precious metal article.

(1) A precious metal alloy in a precious metal article must have a standard at least equal to the standard imprinted on the said alloy.

(2) Precious metals in a precious metal article must be soldered using an alloy of the same standard of fineness and of the same precious metal as the rest of the articles except when this is not technically possible, in which case soldering can be carried out using an alloy of a lower standard of fineness or another material.

(3) No solder may be used in a quantity that is greater than the necessary for joining and in no case shall solder be used for strengthening, weighting, filling or otherwise.

(4) In the case of filigree, small links and other similar minute works, the standard of fineness may, taking the solder into account, reach a margin inferior to the imprinted standard by not more than ten millesims.