5. Applying the Niello Amalgam
Mix Niello amalgam powder with soldering flux and fill in the carved-out design. Apply heat, typically by using a soldering blowpipe, in order for the amalgam to dissolve and to adhere firmly to the object. The level of the Niello amalgam on the object should match closely the level of the silver. Once the amalgam is applied evenly and thoroughly to the whole object it is set to cool. In this step of the process the artists are extremely careful so there are no minute holes (known as ant eyes) in the niello surface.
6. Filing
File and sand the surface to make it smooth, and to remove any overflow of amalgam on the design.