For details, you can draw a fine line with the sharp edge at the end of the new stick. If it becomes dull after use, re-grind with a knife or cutter. Alternatively, you can rub it on a rough surface, such as sandpaper, to get exactly the shape you need.
You can also use a pastel pencil, but its composition has nothing to do with real pastel chalk. Although they can be used to enhance the contrast of the work, the composition of these latter materials is of fairly limited quality.
The slightly greasy “Conte Crayon” chalk pencil can also produce really great effects. However, they should always be applied to existing soft pastel ground and never vice versa. This is all related to the actual strokes you make using the stick itself. However, it is possible to suggest details with the least amount of means. Maybe just a little touch here and there.
For example, if you want to draw glass on the table: Do not draw with a stick. However, paint the background such as a table, wall, or any other object nearby. With The relatively sharp edges on the end of the pastel pencil, trace the contours of the glass very lightly. Skilfully made highlights are enough to create a transparent illusion. A few dark touches and a few strokes with a lighter color than the background can give the glass a liquid-like illusion.
