ADD COLOUR in a small group — Bundle Dye - from 4 people
Autumn/winter season: now with a long-sleeve instead of a T-shirt.
Private bundle dye workshop in Cologne, exclusively for small groups. Using real plants, flowers, and a pH shift that changes the color before your eyes. Includes a T-shirt, color chart on watercolor paper, and complete post-processing in the studio.
Great for: birthdays, girls' nights out, couples, and small groups who want to create something with their hands together.
Plants & Flowers
Dyeing with genuine natural materials using the bundle-dye process.
Experience the pH Shift live
Acid or base changes the color in real time. What was just pink turns green. First on paper, then on a T-shirt.
Color chart and T-shirt included
You will create a color chart on watercolor paper and then move on to the T-shirt. Both will be finished and given to you to take home.
Private & personal
The studio belongs exclusively to your group (4–6 people) for this time.
Natural wine included
One glass while the color develops, alcohol-free alternative also available of course.
T-Shirt Sizes
Please select sizes directly when booking!
Appointment request?
We are there for you on Wednesdays, Fridays, and Saturdays. If you need another appointment, just contact us: simon@cosmaki.com
HERE'S HOW IT WORKS
01 — Arrival, welcome drink, brief introduction to plants and techniques
02 — Creating a color chart on watercolor paper, trying out the pH shift
03 — Designing a long-sleeve shirt: placing, tying, and wrapping plants
04 — Steaming phase, winding down together
05 — Opening and unwrapping, seeing the first results
06 — Post-processing in the studio, pickup after approx. 10 days or shipping
An evening or afternoon just for you. The studio is all yours.
You'll dye with plants, blossoms, and natural materials, which are placed directly onto the fabric, bound, and fixed with steam. What emerges cannot be fully planned – each piece is unique.
Color through chemistry – visible in real-time.
Certain plant dyes react to pH changes: with acid, they turn pink or purple, with a base, they shift to blue or green. This shift happens before your eyes – first on the color chart made of watercolor paper, then on the T-shirt. Not as an effect, but as a principle. You understand what you are doing.
How it works.
You will be welcomed with a glass of natural wine – or an alcohol-free alternative. Then we'll begin.
We start with a brief introduction: Which plants we use, how they react, what happens during steaming. Wear old clothes and dark shoes – plant dyes leave traces.
First, you create a color chart on watercolor paper. You place plants on it, moisten them, add acid or base – and watch the colors shift. This way, you develop a feel for the materials before moving on to the T-shirt.
Then we sprinkle, bind, wrap, arrange. The fabric goes into the steam. What develops inside only reveals itself upon opening.
We take care of all the post-processing: washing out, fixing, ironing. T-shirt and color chart. After approx. 10 days, you can pick up your items or we can send them to you.
Key facts at a glance.
Technique: Bundle Dye with pH-shift
Textile: T-shirt (pre-mordanted), select size directly upon booking
Color card: Watercolor paper, included
Group size: 3–6 people, exclusively for you
Duration: approx. 3 hours
Location: Cosmaki Atelier, Machwerkhaus, Dillenburger Str. 91, Cologne-Kalk
Pickup: after approx. 10 days Shipping optional: €6.50
Optionally, you can book and dye sports socks (Made in Germany) on site.
Great for: Birthdays, evenings with friends, couples, small getaways – for anyone who wants to not just see color, but understand it.
We are here for you on Wednesdays, Fridays, and Saturdays. If you need a different date, just get in touch: simon@cosmaki.com
FAQ
Do we need to bring anything?
No. All textiles and materials are included.
How do we specify the sizes?
When booking, you select your group size. We will follow up with you via email to clarify the appropriate long-sleeve sizes for each person.
Can I take my t-shirt with me right away?
No. The textiles remain in the studio after the workshop and are washed and fixed there. After approx. 10 days, they are ready for collection or we will send them to you.
What does "pre-stained" mean?
The t-shirt was treated with a mordant before the workshop — this is a natural binder that ensures the plant dyes adhere better and last longer. We take care of that for you in advance.
Can I bring my own plants and/or flowers?
Yes, please contact us briefly beforehand. Not all plants are suitable for bundle dyeing – we will help you assess what works.
What is a pH shift?
Certain plant dyes change color depending on the acid or base value of the solution. With citric acid, they turn pink or purple; with baking soda, they shift to blue or green. You'll see this live – first on the color chart, then on the fabric.
Are there parking spaces?
Parking is limited. Public transport is recommended.
Who is this for?
This workshop is ideal for:
- Friends who want to try something new together
- Birthday groups who prefer creative activities over partying
- Groups interested in sustainability, textiles, or plants
- People who want to create rather than just consume
- Curious individuals aged 12 and up, with or without prior knowledge
Note: The group should consist of at least 4 and at most 6 people. Larger groups (up to 12 people) are possible upon request.