Children's T-shirt - for self-dyeing (stained)
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Pretreated and ready to dye
Ideal for natural colors & DIY projects
A simple children's T-shirt made from soft organic cotton.
The cut is straight and comfortable – perfect for play, everyday wear and creative experiments.
Made from 100% GOTS-certified organic cotton with 155 g/m² – comfortable on the skin, durable and long-lasting.
The shirt is already pre-washed and prepared with a cold-etched aluminum triformate stain to ensure that natural colors adhere better and remain permanently bright.
Ideal for parents, daycare centers, workshops or simply as a favorite shirt in color.
Photo source: Stanley/Stella
You can find recipes for self-dyeing HERE
- Fit & Material
- Preparation & dyeing knowledge
- Origin & Processing
Our clothing is made from high-quality organic cotton – soft, durable and comfortable to wear.
Depending on the style, the cut can be classic, loose, or fitted. Fabric weights vary between 155 and 350 g/m².
All pieces are pre-washed, pre-treated and dimensionally stable.
After dyeing, please wash separately, preferably at 30–40°C using ecological detergent.
We use aluminum triformate – a gentle cold stain that ensures that plant dyes adhere better and shine permanently.
Our blanks come from Stanley/Stella , a pioneer for sustainable textiles in Europe.
The pieces are made from certified organic cotton, are fairly produced and durable – ideal for your DIY project or your label.
We source the goods directly, prepare them in our studio and package them plastic-free.
This keeps the supply chain short – and you know where your product comes from.
Less design – more possibility
What are blank goods at Cosmaki?
Our blanks are deliberately kept pure. No printing, no branding.
Instead: high-quality organic basics, prepared or raw, ready for your project.
Whether for your workshop, a school project, your label or your family – at Cosmaki you will find blanks that are not “empty”, but ready : for colour, for change, for circulation.
Pickling service
Stained – what does that actually mean?
In order for plant dyes to adhere permanently to textiles, preparation is sometimes required – the so-called mordant.
Cosmaki offers you two options:
- Unmordified: Ideal for indigo or if you want to mordant yourself
- Stained: Prepared with a cold stain, ready to dye directly for madder, onion skin, avocado, cutch & Co.
You don’t have to know everything – we’re happy to help you choose the right one.
Ideal for …
Who uses Cosmaki Blanks?
- Workshop participants (on site)
- DIY fans
- Parents & Children
- Art & Design Students
- Sustainable merchandisers
- Artists and creatives
Recipes that bring color
Not sure which plant to start with? No problem.
In the Cosmaki blog you will find simple, tried-and-tested recipes for your first dyeing projects – from onion skin to madder, from gerbera to avocado.
You only need to read most of them once – then you can get started.
Origin & Packaging
Transparency from the first thread
We source our blanks from Stanley/Stella – one of the leading manufacturers of sustainable textile basics in Europe.
The pieces are made from certified organic cotton and are fairly produced – durable, high-quality and ideal for dyeing with natural dyes.
Your blanks are packaged plastic-free – in paper bags, tissue paper or envelopes.
We ship locally from Cologne, or you can pick up your order directly from the studio.