Classical black high-gloss piano shellac, a fix term also used in the automobile sector by premium car producers in their marketing.
Most of grands and pianos have a black finish.
The colour, however, is following the latest fashion trends, i.e. in the 60s and 70s of last century the most preferred materials were walnut,
country oak or other brownish wooden cases. Today’s black casings’ surfaces usually consist of a thin machine-dipped polyester layer.
In former times black shellac was put on by hand on mostly closed pore layer wooden material as pear tree.
Since 1950 nitrocellulose coating sprayed in black matt or high-gloss have become fashionable.
Currently, black instruments achieve a higher sales value as the ones with wooden cases.