Ouhi Cha produces etchings and drawings on paper, as well as white monochromatic transformations of various objet trouvé. Facing delicate sentiments in her receptive approach, she uses the medium of art as a tool for self- assertion and self- mirroring. Her earlier works differ in the free marks of elements in various large scale installations, collages and drawings. The division can be read geographically and is connected to her emotional state after leaving Korea and travelling to Europe and Berlin. Her works on paper and stone lithographs, not only become significantly larger , but also develop in depth and sensibility.
The artist aims for a discussion between the works and their viewers. She herself describes her works as a ''symbiosis of constructivism and poetry'', indicating their value which lies in their uncertainty. Although those may not relate to each other directly, she focuses on the intercourse of the two, of decoding, simplifying, as well as discovering their materiality for a possible poetic meaning. Another idea followed by the artist is movement. Her artworks, not following a close plan nor destination, conceptualize ideas of exchange and the overall dialogical character of her works. Her works exist in the context of exchange, questions and connections to thinkable answers. She stresses what is left behind once you concentrate only on the brief and forceful statements.
Dr. Prof. Wieland Schmied: 'Glyphs that resist being read. Notes on the art of Ouhi Cha' aus OUHI CHA, Sail as a Wing'', Ouhi Cha, Top Process, Korea, 2008, pp. 25-28 – Sander; Anette; Krampitz, Dirk: ''Berlin von außen gesehen'', in: Welt, 29.07.2001, URL: https://www.welt.de/print-wams/article614612/Berlin-von-aussen-gesehen.html – Cha, Ouhi: ''a boat is a moving island. 1990- 2006'', Top Process, Korea, 2006, pp. 14-115 – Cha, Ouhi: ''Objet Trouvé- dialogue between the lines. Anniversary Exhibition Jean Art Gallery Center'', Jean Art Center, Korea, 2004, pp. 13-15