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For her exhibition at Marsha Mateyka Gallery, Jae Ko doesn’t deviate much from her formula. That’s not a bad thing. The sculptor, one of the Washington area’s most consistent, has tapped an active vein with her rolled-paper sculptures, which she treats with glue and sumi ink. The works stand on the knife’s edge between sculpture and drawing, and with every return to this format, she pushes them in one direction or another. These latest works fall decidedly along the drawing end of the spectrum. In black sumi and red calligraphy ink, these paper sculptures are elongated versions of works she has done in the past, like unwound springs; the twisting forms represent nothing so much as some sort of calligraphic script. And they look like the result of painstaking work, much as many drawings do. But the works are grounded in sculpture, too, with symmetries and rhythm that resist perfect regularity, just as in nature.

The exhibit is on view 11 a.m. to 6 p.m. Wednesdays–Fridays and 11 a.m. to 5 p.m. Saturdays at Marsha Mateyka Gallery, 2012 R St. NW. Free. marshamateykagallery.com. (202) 328-0088.