Degas

[nikola]

Soil for pastels and is a means of fixing.
     Bed rubbed into the surface covered with a colored ground with the addition of abrasive, sometimes painted using sandpaper
  (my best) ancient painted on specially treated leather.
Imprint bed does not make sense, certainly spoil the color and velvety material. Record in the event that work
imposing color on the color. (fix bottom layer).
Victor G. Mogilevich, for many years worked this material,
not recorded. Bed and without fixing one of the most durable techniques. (Color does not change the quality)
Several papers V. Mogilevich.