The Enameler introduces shade either by using coloured glass or by incorporating pigments towards the glass ahead of firing. Once the glass melts and flows, it cools into a tricky, clean coating above the substrate. 'A lot less is often more,' claims Jennifer Verruto, founder and CEO of Blythe Interiors. https://www.watchesworld.com/exploring-the-aesthetics-of-dial-design-and-decoration/