Color on Textiles: Dyeing, Printing, and Why Fabric Color Is Hard

Paper is a smooth, white, stable surface. Textile is the opposite: a three-dimensional mesh of fibers that absorb colorant into their structure, scatter light from countless filament surfaces, and move - draping, stretching, and creasing. Color is not laid on top; it is taken into a living material. That is why a fabric's color depends not just on the dye but on the fiber, the weave, the finish, and how the light catches the nap.

And textiles are used hard. A printed poster hangs on a wall; a dyed shirt is washed fifty times, sweated in, sat on, and left in the sun. So textile color is judged less by how it looks fresh and more by how it lasts - the family of properties called fastness.

A dye is soluble: its molecules dissolve, penetrate the fiber, and chemically bond inside it. The color goes right through, the cloth keeps its soft hand, and - with the right dye for the fiber - it resists washing. A pigment is insoluble: it is glued onto the surface with a binder. Pigment printing works on any fiber and is simple and cheap, but it sits on top, can stiffen the hand, and may crack or rub away. Compare them in cross-section and after a wash.

There is no universal fabric dye. Each fiber accepts particular dye classes and takes up color to a different degree: cotton and other cellulosics use reactive or vat dyes; polyester needs disperse dyes applied with heat; wool, silk, and nylon take acid dyes. Apply the wrong class and the color barely holds. Even with the right dye, the same recipe gives a different depth and sheen on each fiber. Try one dye across fibers.

Textile color is graded by fastness - how well it survives real life. The big three: wash fastness (no fading or bleeding onto other clothes in the laundry), light fastness (no fading in sunlight, rated on the Blue Wool scale), and rub / crock fastness (no color rubbing off, tested wet and dry). Garments are also tested for perspiration, chlorine, and dry-cleaning. Subject a swatch to each.

Dyeing colors a whole cloth one shade; printing puts a pattern on it. The workhorse is rotary screen printing - one engraved screen per color, pushing thick, vivid, opaque color, brilliant for bold flat designs and long runs. Digital textile inkjet sprays dye or pigment from a file - unlimited colors, photographic gradients, no screens, ideal for short runs and complex art, at the cost of speed and (often) peak vibrancy. Compare a design rendered both ways.

Six questions on dye vs pigment, fiber dye classes, fastness, and textile printing. Instant feedback, no scores recorded - a wrong answer comes with a short explanation.

Textile color builds on the colorants, the permanence, and the print processes around it.