Retro Clean safely removes yellow and brown age stains from all washable textiles., i.e., vintage and antique fabrics, linens, laces, tablecloths, clothes, etc., without compromising the integrity of the textile. It also leaves the fabric with renewed color and vitality. You use 3-4 Tablespoons per soaking. This is a 4 ounce bag. Active ingredient - Sodium Perborate