At that time, van de Velde developed a new technique, the penschilderij. He considered after Goltzius that a work of art can reuse on panel or canvas the techniques of drawing for providing the same sharpness of details on a larger size.
The preparation was long and difficult because the white coating used in background had to be perfectly dry to support the whole quality of a pen drawing. No other artist reused the penschilderej.
On January 29 in New York, Sotheby's sells the view of an unidentified harbor with boats and a lively shore. This pen painting in ink and oil on panel 48 x 65 cm is estimated $ 2M, lot 32.
The result combining the qualities of a painting and those of a drawing is excellent. The artist has managed to execute the backgrounds in a softer line, improving the perception of distance and atmosphere under the beautiful cloudy sky.