Most depicted objects require outlining, especially in small and thin details. Indigo and lac dyes are used for outlining shaded areas of the same color, and in areas with white or gold. Lac dye is used for the last outline to be drawn. All accomplished thangka painters have perfected excellent outlining techniques. It shows accuracy and the painting must have smooth gradations to impart a look of depth or volume where it is needed.
Some artists place the stretcher on their laps or in front of their crossed legs, as they work.
Depending on the complexity and size of the thangka, it takes from a few hours to several days or weeks to finish the first coats of paint. Artists work only during the daylight hours, preferring natural light over artificial, to best render their colors. When a particular color is finished, the painter is done for the day. The next step in thangka creation is scraping smooth the surface with a very sharp knife. This reduces the varying degrees of thickness from the pigment colors.