Exhaust Dyeing Process

••• Tuayai/iStock/GettyImages

Exhaust dyeing also is known as batch, or discontinuous, dyeing. It is the process used for most commercial fabric dyeing.

Dyeing

Essentially, the process involves loading fabric into a bath, originally known as a batch, and allowing it come into equilibrium with a solution, or suspension, of dye. Exhaust dyeing is the ability of the molecules to move from the solution onto the fabric fibers (substantivity). The substantivity of a dye can be influenced by temperature or additives, such as salt.

Rinsing

The exhaust dyeing process can take anywhere from a few minutes to a few hours. When the fabric has absorbed, or fixed, as much dye as it can, the bath is emptied and the fabric is rinsed to remove any excess dyestuff.

Specific Liquor Ratio

An important concept in exhaust dyeing is what is known as the specific liquor ratio. This describes the ratio of the mass of the fabric to the volume of the dye bath and determines not only the depth of color obtained, but also the environmental impact of the process.

Related Articles

How Is Synthetic Camphor Made?
Science Fair Ideas About Which Fabric Absorbs the Most...
The Properties of Nitrocellulose
The Uses of Volumetric Analysis
How to Calculate Solubilities
In What Units Is Solubility Measured?
The Common Uses for Tartaric Acid
What Are the Chemicals in Cornstarch?
Physical Properties of Urea
How to Regenerate Activated Charcoal
What Products Are Made From Seaweed?
How to Make Wood Alcohol Through Distillation
What is Ethanolic Potassium Hydroxide?
Effects of Lime & Alum on Water Purification
How to Make Your Own Styrofoam Formula
Uses of Alum Crystals
How to Stabilize Raw Turquoise
How to Make a 1% Sucrose Solution
Steam Distillation vs. Simple Distillation
How to Extract Pure Caffeine From Coffee