Gray Letters (2016), created for the exhibition 7½: Cryptographic Imagination 4 — Sulki and Min, curated by Oh Sunyoung (Song Bok-eun Foundation, Seoul, 27 August–1 October 2016). Offset printing on paper, eight sheets, 210 x 297 mm each.
Security patterns used in envelopes were scanned and reduced in size to create gray noise fields, which were then applied to a set of writing paper. Each pattern unit was carefully arranged and repeated to avoid the occurrence of a regular, repetitive pattern. See the details below.