https://video.igem.org/videos/watch/5cca9e64-0381-4289-a32e-8c7f9b7bded4 Alginate on calcium paper. 2% (w/v) sodium alginate, printed from the blunt needle onto filter paper soaked in 1% (w/v) CaCl₂. Calcium in the paper sets the line as it lands. A second pass sits beside the first. https://2026.igem.wiki/hk-league Fri, 16 Oct 2026 17:23:03 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://video.igem.org https://video.igem.org/client/assets/images/icons/icon-1500x1500.png https://video.igem.org/videos/watch/5cca9e64-0381-4289-a32e-8c7f9b7bded4 All rights reserved, unless otherwise specified in the terms specified at https://video.igem.org/about and potential licenses granted by each content's rightholder.