Kleurendriehoek, RP-T-1997-8-7(R), Willem Koekkoek, between 1849 and 1895

Identificationtitle(s): color triangle. Object type: sketchbook sheet object number: rp-t-1997-8-7(r). Inscriptions / brands: annotation, handwritten in pencil: 'red/orange violet/yellow green blue'. Description: sheet 7 recto from a sketchbook with 57 sheets. Manufacture. Manufacturer: illustrator: willem koekkoek. Dating: 1849 - 1895. Physical characteristics: pencil. Material: paper pencil. Credit line: donation from mr j. B. Kist, amsterdam. Acquisition: donation 1997. Date: between 1849 and 1895.