Shipping Container Painting Lines for Waterborne Coatings: What Changes in the Paint Shop

Provided by Lin Cong, Technical Director, MUSI Technology · Published September 26, 2026 · Last reviewed September 26, 2026

Quick answer: Since 2017 China’s container industry has moved from solvent-based to waterborne coatings, and plants elsewhere are following for emissions reasons. Waterborne paint changes the line: it needs controlled temperature and humidity to flash off, longer or heated flash-off zones, drying rooms with good airflow, and corrosion-resistant materials wherever wet paint and rinse water touch the equipment.

What waterborne paint needs

• Air conditioning of booth supply air so viscosity and drying are stable through the seasons.
• Flash-off before drying so water leaves the film gently and does not blister.
• Drying rooms with enough air movement across the whole box surface, including corrugations.
• Stainless or protected paint supply components, since waterborne paint corrodes plain steel.

Line layout for containers

A typical container line runs blasting, primer, interior coating, exterior topcoat and drying in sequence, with boxes moved on floor rails or a box-pulling chain and booths with grating floors and pits so the underside can be painted from below.

Reefer containers for global shipping lines, such as CMA CGM’s controlled-atmosphere, low-carbon-emission reefers, have been built on MUSI coating lines at container plants.

FAQ

Can an existing solvent line be converted? Often partly: booths can be reused, but paint supply, flash-off and drying usually need upgrading.

Where MUSI Technology fits

MUSI has supplied painting and blasting lines to container plants and designs lines for waterborne systems. Send your box type and output for a proposal.

Provided by Lin Cong, Technical Director, MUSI Technology