A beautifully crafted, fully biodegradable ink made from seaweed.
Better for art. Better for the oceans.
Launching OCEAN INK®.
OCEANIUM and Cass Art have launched OCEAN INK®, a pioneering seaweed-based ink now available in Cass Art stores and online.
Made from sustainably farmed seaweed, the water-based ink offers a regenerative alternative to conventional solvent and acrylic inks, combining OCEANIUM’s material innovation with Cass Art’s long-standing support for artists.
What Makes Our Ink Different.
✔️ High-quality and vibrant printing
✔️ Derived from sustainably farmed seaweed
✔️ 100% biodegradable and microplastic-free
✔️ Water-based, VOC-free and non-toxic
✔️ Rich, naturally metallic gold finish
✔️ Packaged in recyclable and reusable aluminium tins
✔️ Fully traceable from ocean farm to finished product
Why Seaweed Matters.
Seaweed is one of the most sustainable raw materials on the planet:
100% renewable and carbon negative
Grows in the ocean without freshwater, fertiliser, land, or pesticides
Absorbs CO₂ and removes excess nitrogen and phosphorus from water
Helps restore marine ecosystems and protect biodiversity
Supports coastal livelihoods and regenerative ocean farming
At OCEANIUM, seaweed is processed with low-waste, water-based green chemistry to create high-performance materials with a lighter footprint.
Why it Matters For Art.
Traditional inks pollute: they’re petroleum-based, full of microplastics, and release harmful chemicals that linger in the environment. OCEAN INK® is different. Made from regenerative seaweed, it’s fully biodegradable, non-toxic, and water-based. Responsibly sourced and completely traceable, it’s art that’s better for your work – and for the oceans.
OCEAN INK® FAQ’s.
What can I use OCEAN INK® for?
OCEAN INK® is perfect for hand painting, mark making, experimental work, and screen printing on paper and card. It is not colour fast on clothing without curing.
How long does OCEAN INK® take to dry?
Air dry in 24–48 hours. You can speed up drying at home using gentle heat, like a hairdryer or heat gun, keeping airflow moving to avoid overheating or wrinkling.
How long will my finished artwork last?
OCEAN INK® is water-soluble and biodegradable. To keep your artwork looking its best, avoid prolonged exposure to sunlight and consider sealing or protecting it.
Can I mix or thin OCEAN INK®?
Yes. You can thin it with water (the colour will lighten slightly) and mix it with compatible natural or synthetic pigments.
How should I screen print with OCEAN INK®?
It works with manual or automated screen-printing equipment. Recommended setup:
Mesh: 34 threads or 77 threads/cm
Ink deposit: ~30–50 g per m² per screen pass
Stencil: Liquid emulsion stencil (e.g. Kiwo 2155)
Squeegee: 9 mm thickness, 75 shore hardness, square edge profile
How can I dry OCEAN INK® using industrial equipment?
Recommended settings:
Dryer: 8.5 m Natgraph tunnel dryer
Temperature: 50°C
Dwell time: 3 minutes
How long can I keep OCEAN INK®?
Unopened, it can last up to 2 years. Once opened, refrigerate and use within 2 months.
Will the colour change over time?
This is a natural product, so subtle colour changes may occur. These variations are part of its unique character.
Is OCEAN INK® safe to use?
Yes. It is water-based, non-toxic, and plant-based.
Can I use OCEAN INK® on food or drink items?
No. It is intended for art use only.
Is OCEAN INK® vegan?
Yes. It is completely plant-based.
Does OCEAN INK® contain allergens?
It is made from seaweed and may contain trace crustacean residues from the natural marine environment.
Art For Your Oceans at Sotheby’s, London.
OCEAN INK® was showcased as part of Arts for Your Ocean, a landmark exhibition at Sotheby’s celebrating creativity, ocean regeneration and new sustainable materials.
The exhibition brought together leading artists, designers and innovators to explore how art can play a role in protecting and restoring our oceans. Demand and response from the art community helped shape OCEAN INK® into a product now available for wider creative use.
News.
OCEANIUM Featured In Nutritional Outlook
OCEANIUM has been featured in Nutritional Outlook following a recent interview with our board member Dr. Sybille Buchwald-Werner. The discussion explores what it truly takes to bring seaweed-based nutraceutical ingredients to market, from building resilient, fully...
Featured in Personal Care Insights: How biotech is maturing marine beauty.
OCEANIUM has been featured in Personal Care Insights in the article “Engineering cosmetic credibility: How biotech is maturing marine beauty.” The piece explores how the beauty industry is shifting its focus from ocean-inspired storytelling to science-backed,...
OCEAN ACTIVES® C+: Global Skincare Momentum
We’re thrilled to announce another milestone for OCEAN ACTIVES® C+, our award-winning seaweed bioactive: a leading Indonesian skincare manufacturer has selected it for an upcoming range of sensitive-skin products. This partnership, secured via our Southeast Asia...
Committed to Impactful Products.
Learn about our commitment to sustainability by sourcing from regenerative seaweed farms, our innovative clean label ingredients and proprietary green processing methods.