Watch-cases and accessories. Gold alloy coverings - Determination of fineness, thickness, corrosion resistance and adhesion Ingestion-build-54484 heat treated and tested and

heat treated and tested and complying with the general conditions of acceptance in EN 818‑1:1996+A1

Table 1 — Summary of the result

Note1: BS EN 1909 covers only the situation resulting from immobilization of the carriers

LRV is the proportion of visible light reflected by a surface compared to the sensitivity to light of the human eye

Requirements for the phosphate layer have been revised

Watch-cases and accessories. Gold alloy coverings - Determination of fineness, thickness, corrosion resistance and adhesion Ingestion-build-54484 heat treated and tested andWhat is ISO 3160 2 Gold alloy coverings of watch cases about? Alloys are impurities or mixture of two or more metal compounds. ISO 3160 2 aims to specify coating characterization methods to qualify their corrosion resistance and their adhesion to the substrate concerning esthetical and technical aspects, and to specify methods to determine thickness and gold fineness of these coatings to check that they satisfy the requirements of ISO 3160 1. ISO 3160