Color Changeover: Cutting Downtime on Your Coating Line

A powder coating line that runs many colors spends a serious share of its shift on changeover: emptying the booth, cleaning the guns, purging the reclaim, and spraying test parts until the previous color is gone. Changeover is pure cost – no parts are produced, powder is wasted, and rejects spike while the line stabilizes. Here is where the time goes and how to cut it with procedure, scheduling and hardware.

Where Changeover Time Goes

• Booth cleaning: walls, floor and filters must be free of the previous color
• Gun and hopper purge: powder left in the system contaminates the next color
• Reclaim handling: recovered powder belongs to the previous color and must not re-enter the line
• Test spraying: operators spray parts until the color is clean, wasting powder and parts
• Recovery: if the change is to a lighter or higher-gloss color, more cleaning and more test parts are needed

Clean the Booth Systematically, Not Speedily

The reliable way to clean is a fixed sequence: shut off the reclaim, empty and clean the hopper, purge the guns, wipe the booth walls from top to bottom, change filters, then run the first test parts. A checklist turns this into a repeatable routine and prevents the classic failure – finding a speck of the old color in the new film after the line has been running for an hour. Clean to the next color: changing to dark or textured colors is faster than changing to white or high-gloss.

Reclaim: The Contamination Trap

Reclaimed powder is valuable and dangerous at the same time. Mixed colors in the reclaim are the single most common source of specks and color shift, so the reclaim system must be emptied and cleaned with the same discipline as the booth. Many lines keep reclaim per color family or dedicate equipment for white and light colors, accepting the material loss as cheaper than a contaminated batch.

Schedule Changes to Minimize Loss

• Group colors: run all dark colors together, then light colors, and save white for last
• Save the lightest and highest-gloss color for the end of the day or the start of a fresh run
• Batch similar products so one changeover serves a long run
• Plan around the reclaim: use one color family per reclaim cycle
• Keep an emergency color that matches many jobs for quick changeovers between orders

Fast-Change Hardware Worth Buying

Quick-release hoppers, spare gun sets per color, and purge-friendly booth designs cut changeover minutes into seconds. A dedicated gun and feed line for the most common color removes that color from the changeover entirely. For high-mix lines, investing in a second booth for light colors can pay back quickly by eliminating the longest and most delicate changeover – the one into white.

Measure Changeover Like Any Other Cost

Track the minutes per changeover, the powder lost, and the test parts consumed, and you will find the biggest wins. Lines that log this data routinely cut changeover time by 20-40% within months, simply because the losses became visible. Compare your numbers against the previous quarter – the improvement is usually in the process, not the hardware.

Plan Colors and Powder Together

Changeover time is also decided at the purchasing desk: fewer colors and disciplined color families mean fewer changes. If you are setting up a new line or reviewing your color range, we can help you consolidate colors, confirm the right formulations for each family, and supply samples so you can test changeover behavior before you standardize.