Sampling and testing
Before your goods can be hallmarked they must first of all be tested to ensure they are of the standard submitted.
In order to test your goods we must first of all remove a sample of metal. The amount of sample removed is normally less than 100 milligrams or one tenth of a gram.
Where it is not possible to remove a sample we are also able to test using X-ray Fluorescence Spectroscopy or XRF this method is ideal for finished gold, silver and platinum pieces.
Any physical sample removed is analysed by our in house 17025 laboratory using either:
Cupellation or "fire assay" for gold.
Potentiometric titration for silver.
X-ray Fluorescence Spectroscopy or XRF for platinum.
