Determining Raw Cashmere Micron Profiles and Dehairing Yields
Determining raw cashmere value requires combined OFDA micron profiling and oven-dry yield mass balance testing to calculate true clean dehaired cost.
Dross Loss
Metal Oxidation
High temperature coating applications produce oxidized metal crusts and insoluble impurities that float on molten baths during zipper component casting or wire plating. The dross loss measures the net reduction of virgin alloy mass converted into unusable scum during melting and coating cycles. This material degradation directly impacts raw metal consumption rates in garment hardware manufacturing.
Slag Formation
Molten zinc, tin or lead alloys react with ambient oxygen and molten flux compounds inside casting pots. Skimming tools remove this floating slag regularly to prevent inclusions in die-cast slide fasteners or metallic snap buttons. High thermal exposure and bath turbulence accelerate oxidation, increasing the total weight of discarded dross.
Financial Accounting
Foundry accounting records virgin metal input against finished cast weight and recovered scrap to calculate total metal conversion efficiency. High dross loss percentages increase raw material expenditure per thousand finished zipper sliders. Scrap recyclers buy collected dross at steep discounts compared to virgin metal ingots, recouping only a fraction of initial material costs.
Facilities monitor flux quality and bath temperature controls to minimize oxide skim formation.
Process Optimization
Nitrogen blankets and automated skimming devices reduce liquid metal contact with atmospheric oxygen. Lowering oxidation rates keeps dross loss within tight operational budgets.