本帖最后由 京城小六子 于 2014-11-25 10:44 编辑
As you know, the Lange One Tourbillon Handwerkskunst features a stunning black enamel dial. During the event organized in Dresden, Romy Zimmermann was preparing the specific powder used to create the dial. Lange published a few days ago pictures which describe the full enamelling process. I propose to share them with you.

1 Preparation of the Enamel

First of all, the basic raw material, a special kind of glass, is reduced to microscopic fragments by rubbing and crushing in a mortar, so that it can then be sieved or applied wet with a brush.

2 Treatment of the Back



Counter-enamel is applied to the back of the dial. This is necessary to prevent distortion of the enamel on the dial side through excessive stresses.

3 Filling Interstices



Small interstices between letters and figures are filled with enamel using a fine brush.

4 Sieving



The fine enamel powder is spread evenly over the dial with a sieve. The piece is then fired briefly at a temperature of several hundred degrees in a special kiln. These steps may be repeated several times.

5 Enamel Dust



During sieving, the fine enamel dust is collected on a piece of aluminium foil.

6 Firing and Cooling



After each firing, the dial is cooled slowly on a fireproof support. Only when the dial has been completely dried and cleaned can the sieving operation be repeated. This process takes several days.

7 Metamorphosis



The more enamel layers are applied, the darker the final surface appears. Thus, the blue shimmering enamel particles turn into the black dial eventually.

And the result is even more beautiful when the watch is put on the wrist! Why? Because the dial creates subtle shades of light...

黑难烧

学习啦，真漂亮

学习！

红的难烧

珐琅和景泰蓝是一回事么？