Introducing Needham Ink UV Dot Inks: Invisible Traceability for Cans and Packaging

In modern manufacturing, traceability is no longer just about meeting operational requirements. It is about protecting products, supporting quality control, improving line visibility and giving manufacturers confidence that every pack can be identified when it matters most.

However, not every code or mark needs to be visible to the end user.

 That is why Needham Ink is launching its new UV Dot Ink range, developed for covert industrial coding applications where traceability is essential but visible pack disruption is not. These specialist inks are designed to create small, UV-readable dots that remain invisible to the naked eye in normal light, yet become instantly visible under UV inspection. 

Invisible in normal light. Visible under UV.

Needham Ink UV Dot Inks are designed for manufacturers who need a secure, discreet and reliable way to mark products without changing the appearance of the pack.

The ink dots can be applied as covert marks for traceability, authentication, quality assurance and line control. In normal light, the marks are not visible, meaning branding, packaging design and shelf presentation remain unaffected. Under UV inspection, the dots become clearly readable, giving production teams a simple way to verify, identify or track products during or after manufacturing.

This makes the range particularly suitable for applications where visible codes may not be desirable, but where internal traceability still needs to be maintained.

Designed for cans, packaging and high-speed production lines

The primary use for the UV Dot Ink range is covert traceability dots on cans, but the technology is suitable across a wider range of packaging and industrial substrates.

Typical applications include:

Beverage cans
Ideal for discreet traceability on aluminium cans where visible markings could interfere with brand presentation or pack aesthetics.

Food packaging
Useful for adding covert production, batch or line control references without changing the consumer-facing appearance of the packaging.

Pharmaceutical traceability
Supports authentication and controlled identification where reliable inspection is important.

Cosmetics and personal care
Allows manufacturers to protect premium packaging designs while still adding a hidden traceability layer.

General industrial coding
Suitable for wider industrial environments where invisible marks can assist with QA, sorting, inspection or process control.

A 13-colour UV-readable ink range

The new UV Dot Ink range is launching with 13 UV-readable ink colours, giving manufacturers flexibility depending on the application, inspection method and substrate.

The current colour range includes:

Orange, Pink, White, Dark Yellow, Red, Peach, Lilac, Mint, Malachite, Aqua, Green, Yellow and Blue.

This expanded palette gives production teams more options for internal coding logic, multi-line identification, product differentiation or authentication processes. For example, different colours could potentially be used to support different product families, filling lines, production shifts or inspection requirements.

Built for reliable industrial performance

Needham Ink UV Dot Inks have been developed with industrial production environments in mind. The range is designed to support consistent dot formation, strong readability under UV inspection and stable performance on high-speed production lines.

Key product benefits include:

Invisible marks in normal light
Covert dots can be applied without affecting pack design, printed artwork or customer-facing branding.

Instant UV visibility
Marks are revealed quickly and clearly under UV inspection, supporting fast verification and quality checks.

Fast-drying solvent-based formulation
The inks are designed for production environments where speed matters and downtime needs to be minimised.

No UV curing required
The range is UV-readable but does not require UV curing, helping simplify integration into existing production processes.

Reliable dot formation
Consistent dot quality supports dependable traceability and repeatable inspection.

Excellent substrate compatibility
The inks are suitable for aluminium cans, glass, PET, HDPE, coated cartons and metals.

Supporting authentication, QA and line control

The value of UV Dot Inks goes beyond the mark itself. For manufacturers, covert coding can become part of a wider quality and traceability process.

A UV-readable dot can help confirm that a product has passed a specific stage of production. It can support internal line control by identifying where a product was filled, packed or processed. It can also provide an additional authentication layer for products where security, verification or brand protection is important.

Because the dot is not visible in normal light, this can all be achieved without changing the external look of the pack.

For brands where packaging design is carefully controlled, this is a major advantage. Manufacturers can add traceability while preserving the appearance, finish and visual quality of the final product.

Ideal for manufacturers that need discreet control

Many coding and marking applications are designed to be seen. Best-before dates, batch codes, barcodes and product information all need to be visible for compliance, logistics or consumer use.

UV Dot Inks serve a different purpose.

They are designed for applications where the mark is intended for internal control, inspection or authentication rather than public display. This makes them a strong option for manufacturers looking to add an extra layer of traceability without introducing visible codes onto the pack.

In sectors such as beverages, food, pharmaceuticals, cosmetics and industrial packaging, that balance between control and appearance can be critical.

Samples, compatibility and pricing

Every production line is different. Substrate, line speed, inspection setup and coding equipment can all influence the best solution.

Needham Ink can support customers with information on samples, compatibility and pricing to help determine the most suitable UV Dot Ink for their application.

Whether the requirement is covert traceability on beverage cans, hidden QA marks on packaging, or UV-readable dots for industrial line control, the new Needham Ink UV Dot Ink range offers a discreet and practical solution.

Need a covert coding solution that protects pack appearance while supporting traceability?

Speak to Needham Ink about UV Dot Ink samples, compatibility and pricing.
Visit www.needham-ink.com or contact enquiries@needham-ink.com to learn more.