Measure how much gross metal was lost during a jewellery operation by comparing starting feed with final recovered or finished weight.
Gross process loss is measured against the starting metal weight. This is different from gold purity loss: changing alloy composition can change the weight without meaning that the same amount of gold was lost.
A jewellery process can remove solder, alloy components, polishing material or other non-gold mass. For a more precise precious-metal reconciliation, assay-based fine-gold calculations should be performed separately.
Track consistent starting and ending weighing points for similar jobs. Large changes in the calculated loss rate can then be investigated rather than hidden inside an overall monthly average.
No. Gross mass can include alloy and non-gold material.
Yes, using the optional purity and spot price.
A final weight greater than the starting weight indicates that additional material entered the measured stream and should be investigated.