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How to Make DIY Sketchbooks Using an Acrylic Pour Technique
Industrial designer Eric Strebel recently got his hands on a vintage Wire-O Punch for spiral bindings. Using that and an acrylic pour technique, he shows you how to make custom sketchbook covers with a trippy effect:
https://www.core77.com/posts/81560/How-to-Make-DIY-Sketchbooks-Using-an-Acrylic-Pour-Technique