Kelp is an original Cambridge Imprint design, first published in 2025. It is an undulating line of waving or oscillating fronds, which could be found in nature or perhaps arising from a mathematical formula. When viewed from far away a natural vertical stripe emerges optically that is not evident close up. Available in five colour ways: Raspberry Ripple, French Ultramarine, Boiled Egg, Tangerine, and Blueberry.

Cambridge Imprint paper is printed in England on responsibly sourced paper of archiving quality, using vegetable oil-based inks that are kind to the environment. Each sheet is printed in one or two hand-mixed inks on uncoated 90 gsm stock to create a high-quality matte paper with a hand-printed feel to it.