Colour calibration

Setting up an ICC profile

If you print in-house, generate or install an ICC profile specific to your printer and vinyl stock combination — printer manufacturers often publish these for common materials, or a local print shop can build one from a target sheet for $30-$60. Without one, your printer's default colour management guesses, and guesses drift over months as ink cartridges age.

Running test strips every cycle

Print a small strip containing your brand's fixed colours before every production run, not just when something changes. Compare it against a physical reference swatch you keep in a drawer — not a screen, which has its own drift — and recalibrate if you see a shift of more than a shade.

• Keep one physical reference swatch, never trust a screen for comparison
• Test-strip every run, even repeat colours
• Replace ink cartridges before they run dry, not after — low ink shifts colour first
• Recalibrate profile every 3-6 months or after any hardware service

Working with a print partner's calibration

If you outsource, ask what calibration schedule the partner runs and request a physical proof sheet before your first full run, and periodically after. A partner who can't answer questions about their calibration routine is a risk worth weighing against their price.

Diagnosing a drift when you spot one

When a colour has clearly shifted, work through causes in order of likelihood rather than guessing: check ink levels first, since low cyan or magenta shows up as a warm cast before the printer even flags it; check the vinyl batch next, since some suppliers vary coating slightly between production runs; then check lighting, since comparing under a warm bulb versus daylight will make an identical colour look different every time.

• 1. Check ink levels — low ink shifts colour before it runs out
• 2. Check for a new vinyl or laminate batch from your supplier
• 3. Compare under consistent daylight-balanced lighting, not indoor bulbs
• 4. Re-run the ICC profile if the first three checks come back clean

Documenting calibration for anyone who helps you

Write your calibration steps down as a short checklist rather than keeping them in your head, especially once anyone else touches printing or cutting. A new assistant who doesn't know to check ink levels before a run, or who compares a proof under a warm kitchen bulb instead of daylight, can introduce exactly the drift this whole lesson is built to prevent.

Calibration across a print partner switch

If you move from home printing to a print partner, or between two print partners, treat the first order as a full calibration event rather than a normal reorder. Request their proof sheet, compare it against your physical reference swatch under daylight, and only then approve — a partner switch is exactly the moment a colour drift is most likely to slip through unnoticed, since you have no prior run from them to compare against.