Glossary

Tray

A parallelepiped unit of stock from which plates, bridges and other components are manufactured, either on CNC machines or by spark machining.

Flat black polished

A watchmaking term defining a perfect surface finish, which looks black under a certain light incidence angle.

Lapping

Operation consisting in removing a large amount of stock, using cast iron plates as a support for the abrasive slurry

Flat polishing

Operation consisting in obtaining a “flat black polished” surface finish

Polishing

Operation consisting in achieving a scratch-free surface finish

Mechanochemistry

Use of a chemical additive, in addition to the lapping / polishing slurry, to promote the stock removal rate and/or make it easier to obtain a particular surface finish.

Glossary

Tray

Flat black polished

Lapping

Flat polishing

Polishing

Mechanochemistry

PBMC SA