Silver-filled is a new layered metal that was introduced during the recent surge of silver prices during the recession. 金属含有量が材料全体で同じではないため、合金ではありません. その代わりに, the sterling silver is all on the surface. シルバーフィルドはどちらかです 5% 又は 10% sterling silver by weight fused with heat and pressure to a brass core. This metal is fairly new so it is not standardized in the US. シルバーフィルドは層状の金属であるため、鋳造することはできません。. The silver layer is much thicker than silver plate but this is still a much lower quality product than solid sterling silver jewelry supplies and alloys. It will tarnish and it should only be soldered with precision equipment and special training. Now that the price of silver has come down from past highs the metal is less common in the market. 現時点では、シルバーフィルドの法的に承認された品質スタンプ基準はありません。. しかし, スタンプを使う人もいます .925 SF, 誤解を招く可能性があります.