What Covert UV Green does on packaging
Covert UV Green is made for covert marking on packaging surfaces that need a quiet but reliable security cue. Under normal light the mark stays low-key, then it shows clearly when checked under the correct UV light. That makes it useful for stock control, channel verification and anti-tamper programmes where you do not want the security feature shouting for attention on the shelf.
The ink is designed for South African packaging lines that work across hot inland conditions, humid coastal storage and busy dispatch schedules. It can be worked into cartons, sleeves, labels and secondary packaging where a discreet security mark is needed without changing the look of the printed pack too much.
Where it suits best in local supply chains
This product is a practical choice for packaging converters supplying distributors, wholesalers and retailers that need fast visual checks at receiving, picking or store level. It is especially useful where product passes through several hands and there is a need to confirm that the pack is genuine before it reaches the shelf.
- Distribution cartons and shipper cases
- Retail-ready packs and inner cartons
- Labels for regulated or high-value goods
- Promotional packs with controlled release runs
- Products moving through coastal and inland warehouses
In Durban and along the coast, humidity can affect drying and handling windows, so we normally look at the full packaging system, not only the ink. If the substrate, coating or overprint varnish is not right, the mark may not hold cleanly or verify well later.
Sizes, supply options and line set-up
ThermoInk supplies Covert UV Green in practical production sizes for trial work and full runs. We can support small approval batches, then scale into regular supply for converters with repeat demand. The exact packing format depends on the press line, coverage requirement and the security level needed for the job.
- Trial batch sizes for development and approval
- Production drums or pails for ongoing runs
- Matched colour and threshold settings for repeat jobs
- Retain samples for batch comparison and future checks
No special power or gas connection is needed for the ink itself. On press, you only need the normal equipment already used for the chosen print method, plus a suitable UV verification lamp for checking the covert response. If you are setting up a new line or changing substrate we can help with press startup support and compatibility checks.
Technical points converters should confirm first
Before ordering, confirm the substrate, print process and inspection method. A security ink can only do its job properly when it matches the surface and the verification setup. If the ink sits on an untested coating or a dusty board, the result can be uneven and harder to read under inspection.
- Surface type: coated board, film, label stock or laminated pack
- Target inspection method: handheld UV or fixed check point
- Drying window and line speed
- Expected rub resistance and scuff contact
- Any overprint varnish or protective coating planned
We can carry out adhesion tests, rub resistance checks and UV verification setups before full production. That keeps the job practical for converters in Jacobs, Pinetown, Prospecton and further afield, especially when a pack has to move through warehousing, transport and retail handling without losing its security cue.
Care, servicing and on-going quality control
Once Covert UV Green is in production, keep the ink covered when not in use and store it in a cool dry place out of direct sun. Coastal moisture, dust and frequent lid opening can affect handling, so basic housekeeping matters. Stir only as directed and keep transfer equipment clean to avoid contamination between runs.
For repeat orders, keep a batch retain library and compare new stock against the approved sample. That helps when you are running the same artwork month after month and need the UV response to stay consistent. If the line starts showing poor transfer, weak verification or inconsistent density we can assist with production troubleshooting and threshold tuning.
Ordering from Jacobs for national delivery
Clients reach us through the enquiry form on our contact page, and we work with packaging converters across South Africa from our Jacobs base in Durban. Deliveries go to local and national supply points including Durban South, Pinetown, Prospecton, Cape Town, Gqeberha, Johannesburg and Pretoria, which helps keep lead times manageable for planned production.
To order smoothly, send the pack type, substrate, run size and any security requirement you need the ink to meet. If you already have a printed sample, include the details of the current coating or finish so we can advise on compatibility. That way the first run is less likely to need rework and the ink can be matched to the job properly from the start.
Key facts
| Product type | Covert security ink for UV verification on packaging |
|---|---|
| Visible colour | Green under normal print conditions |
| Verification method | UV light inspection at distribution or retail level |
| Typical use | Cartons, labels, sleeves and secondary packaging |
| Supply format | Trial batches and production supply options |
| Base location | Jacobs, Durban with deliveries nationwide |
