Start With the Right Reference, Not Just a Nice Sample
A solid approval routine begins before the press is loaded. The team needs one agreed reference for colour, artwork position and finishing expectations. If the sample on the table was printed on a different stock, under different lighting, or with a different finishing method, it can create arguments that have nothing to do with the real job. The goal is to compare like with like as far as possible.
In practice, that means checking the approved artwork file, the substrate, the ink set and the finishing plan together. A label that must hold colour on a clear film will behave differently from one printed on white paper or textured material. If metallics, soft-touch varnish or cold foil are involved, they should also be included in the approval discussion before production starts. It is much easier to sort this out in the setup room than after a full pallet is already printed.
- Use one signed-off reference sample for the job.
- Check substrate, finish and ink system before comparing colour.
- Confirm whether the approval is for daytime viewing, retail shelves or another use.
Agree on Lighting and Viewing Conditions Before You Judge Colour
Colour can look very different under fluorescent light, daylight or the mixed lighting often found in factories. That is why teams should not approve labels while standing in a doorway or beside an open roller shutter in mid afternoon sun. A routine that uses the same lighting every time is far more reliable. If the approval is done in a print room, that room should be kept as consistent as possible.
For Gauteng sites in places like Spartan or Kempton Park, dusty afternoons and changing light can make visual checking harder than people expect. Coastal humidity in Durban or Gqeberha can also affect how stock feels and behaves during setup, which may influence the final appearance. A practical approval process accounts for these small changes instead of pretending they do not matter.
Teams should also choose the same viewing angle and distance each time. A label meant for a bottle, carton or retail pack may look right straight on but shift slightly when seen from a shelf angle. That is why it helps to define the approval method in simple terms and use it the same way on every repeat job.
Keep Press Set-Up Checks Tied to Colour Approval
Colour approval should never sit apart from setup. When the press is being prepared, the operator needs to know which variables are allowed to move and which must stay fixed. Ink viscosity, anilox condition, plate mounting and web tension all play a part in how the colour lands on the web. If one of these changes during the run, the approved colour can drift before anyone notices.
For narrow-web flexo work, it helps to run a short, disciplined checklist during make-ready. That way, the team is not trying to solve colour and setup problems at the same time. If the first sheets or metres are slightly off, the issue can be traced more cleanly to a setup point rather than blamed on the whole press.
- Confirm plate mounting is correct and repeatable.
- Check anilox condition and cleanliness before colour approval.
- Record the setting range used for the approved run.
- Watch for load shedding delays that can interrupt ink stability or restart timing.
Use a Short Approval Chain So Decisions Do Not Drift
A common mistake is letting too many people join the colour decision at different stages. One person approves the first pull, another changes the expectation later, and production ends up chasing a moving target. A better approach is to keep the approval chain short and clear. The operator, the technical lead and the customer contact should each know when their sign-off is needed and what they are signing off on.
Where possible, approval should happen before full speed production begins. That does not mean rushing the team. It means setting a clear checkpoint after setup and before the job is committed. If the customer is not on site, a good photo alone is not always enough because phone screens vary. In those cases, a recorded reference note with measured settings and a visual description can support the next run.
Teams that work this way often find fewer disputes later, especially on repeat labels for food, beverage, cosmetics and retail packs. Once the approval chain is known, the press crew can focus on print consistency instead of waiting for extra opinions to come in from the office, warehouse or loading bay.
Treat Finishing as Part of Colour, Not an Afterthought
Finishing changes how colour is seen. A gloss varnish can make a shade appear deeper, while a matt finish can soften contrast. Foil, lamination and die-cutting can all affect the final look of the label. If a team approves colour before those steps are considered, the finished label may no longer match the sample in the way everyone expected.
That is why approval routines should include finishing setup from the start. If the job will be overprinted, varnished or die-cut in a certain order, that sequence needs to be clear. A label converter in Johannesburg or Pretoria may already know the press side well, but the same logic must apply to finishing tables and inspection points too. When the finishing plan is part of the approval, the final pack on shelf is far more likely to match the intended look.
- Confirm finish type before colour sign-off.
- Check whether gloss or matt will change how the shade reads.
- Include trimming and die-cut position in the final approval.
Build a Repeatable Routine for South African Production Conditions
The best approval habits are simple enough to repeat on every shift. They should work whether the job is running in Kempton Park, Durban or Cape Town, and whether the team is handling a short emergency order or a longer planned run. The routine should cover reference sample, lighting, setup, finishing and sign-off in one clear order. Once that order is fixed, the team spends less time arguing and more time printing.
In a busy Spartan factory, for example, a label converter may need to restart after a power cut, then pick up the same colour again without wasting metres. That is where good routines matter most. The crew can return to the approved settings, check the first printout and continue with confidence instead of starting from scratch. The same discipline helps on remote support calls, where a technical manager or service technician can guide the team back to the agreed point more quickly.
For many South African businesses, the real value of colour approval is not the sample itself. It is the discipline behind it. When everyone follows the same routine, presses start faster, print waste drops, and the final labels hold together better across seasons, shifts and different sites.
