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Although bio\u2010inspired structural colors offer a promising alternative, efficiently and conveniently achieving high\u2010resolution, reversible, and eco\u2010friendly patterning of dynamic optical content remains a formidable challenge. Here, we report a scalable and sustainable color\u2010printing strategy that employs pure water to activate dynamic patterns within laser\u2010programmed cholesteric liquid crystal networks (CLCNs). By leveraging laser direct\u2010writing technology, a highly temporal\u2010spatial resolution complex optical information with a highly customizable printing ecosystem has been constructed. This strategy relies on adjusting the spatial distribution anisotropy of internal cross\u2010link density to program the swelling behavior of the helical\u2010structures, which generating structural\u2010color can cover across the full visible spectrum. We demonstrate the versatility of this high\u2010throughput fabrication platform through multidimensional information encryption, self\u2010adaptive QR codes, and smart architectural coatings. The presented new printing ecosystem, due to its characteristics such as easily accessible raw materials, simple process, high economic applicability, and environmental friendliness, is bound to have a broader development space and will not be confined to laboratory manufacturing.<\/jats:p>","DOI":"10.1002\/adma.74949","type":"journal-article","created":{"date-parts":[[2026,9,8]],"date-time":"2026-09-08T14:58:20Z","timestamp":1788879500000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Laser\u2010Printing of Dynamic Colorful\u2010Patterns Activated by Pure\u2010Water"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-4023-3583","authenticated-orcid":false,"given":"Jiale","family":"Liu","sequence":"first","affiliation":[{"name":"Institute For Advanced Materials and Technology University of Science and Technology Beijing  Beijing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianying","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering Peking University  Beijing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinzhao","family":"Xia","sequence":"additional","affiliation":[{"name":"Institute For Advanced Materials and Technology University of Science and Technology Beijing  Beijing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo","family":"Yang","sequence":"additional","affiliation":[{"name":"Institute For Advanced Materials and Technology University of Science and Technology Beijing  Beijing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yunxiao","family":"Ren","sequence":"additional","affiliation":[{"name":"Institute For Advanced Materials and Technology University of Science and Technology Beijing  Beijing P. R. 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China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenting","family":"Xie","sequence":"additional","affiliation":[{"name":"Institute For Advanced Materials and Technology University of Science and Technology Beijing  Beijing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-9207-6225","authenticated-orcid":false,"given":"Wei","family":"Hu","sequence":"additional","affiliation":[{"name":"Institute For Advanced Materials and Technology University of Science and Technology Beijing  Beijing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3773-6666","authenticated-orcid":false,"given":"Huai","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering Peking University  Beijing P. R. 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