T-Shirt · Stain-Dye · Logwood / Iron · Unisex

Brief description:

Hand-dyed T-shirt using the stain-dye process with logwood, iron and soda; the color develops over several days of contact phases in open dye baths.

Fit:

• Unisex Relax Fit (runs large)

Technical description:

Materials & Preparation

• Fiber: 100% combed ring-spun organic cotton - 155.0 GSM
• Pre-mordanting: Aluminum triformate (cold mordant) to prepare the fiber for vegetable dyes

dyeing system

• Dye: Logwood
• Modifier: Iron to darken the logwood solution
• Additive: Soda to activate the dye solution

Process parameters

• Method: Stain-Dye (local application or flat storage in dye solution without full immersion)
• Contact time: several days in open tubs, with varying wetting intensity
• Cure Phase: Resting phase to stabilize the dye binding before the final rinse
• Oxidation: natural color development through contact with air during and after the cure phase
• Final step: Rinse, then machine wash with mild detergent, followed by steam finishing and air drying.

Coloring page

• Pattern: irregularly distributed, cosmic formations
• Tonal values: violet-grey to deep grey areas, depending on iron contact and contact edges
• Structure: fine, localized pigment concentrations in areas of prolonged moisture

Production

• Location: Cosmaki Natural Dyeing Studio, Cologne
• Date of dyeing: October 8, 2025
• Method: fully manual dyeing series

Notes

• Each piece develops a unique color pattern through several days of storage.
• Slight tonal changes may occur during use.
• Care: Wash separately or with similar colors for the first two washes, in cold or lukewarm water; use a gentle detergent.