Until 1807, when Frederick began to paint with oil, his main technique was sepia. This technique Friedrich took, apparently in Dresden, taking it from artists such as Adrian Tsigg and Jacob Zeidelman. He usually did the basic sketch with a pencil, and then painted it with sepia. The intensity of sepia tone can be changed by adding or subtracting the amount of water in which the pigment is dissolved, and in this sepia is very similar to watercolor paint.
Just like watercolor, sepia can be made more dense with the help of added gum arabic. Frederick used all these technical methods. The early works of Friedrich, performed by sepia, show that the artist began to master his main themes even before he switched to oil painting. Sepia Frederick continued to write throughout his life – in particular, it is in this technique created one of his latest works, “The ruins of the abbey in Eldene,” part of a series of paintings dedicated to the seasons.