Colorant migration is a critical phenomenon in various industries, affecting product quality and performance. Understanding the types of migration helps in selecting the right solutions. Below are the key migration types.

1. Diffusion-Based Migration

Occurs when colorants move due to concentration gradients. Common in polymers and coatings.

2. Bloom Migration

Surface accumulation of colorants, often seen in plastics and rubber.

Causes: Poor solubility, incompatible formulations

Effects: Uneven appearance, reduced adhesion

3. Plate-Out Migration

Colorants deposit on processing equipment, common in extrusion and molding.

4. Gas Fade Migration

Exposure to atmospheric gases (NOx, SOx) causes discoloration.

Industries Affected: Automotive, textiles

Solutions: UV stabilizers, gas-resistant coatings

5. Solvent-Induced Migration

Liquid carriers transport colorants, prevalent in inks and dyes.

6. Thermal Migration

Heat-driven movement, critical in high-temperature applications.

Key Factors: Processing conditions, material stability