Vinsak positions Rotatek 850 as the missing middle for packaging converters

In packaging, most technology shifts do not arrive with a drumroll. They arrive quietly, in the form of a converter asking a simple question that changes the whole equation. What if the job is too long for digital to make sense, but too short for gravure to justify its origination cost. What if the brand wants quality that holds up on shelf, but also wants agility, frequent changeovers, and predictable margins. That gap is where Vinsak Group wants Rotatek’s Universal 850 to live.

Ranesh Bajaj, director at Vinsak Group, describes the Universal 850 as a platform designed for converters who want to build profitability through application-led thinking rather than scale-driven production. The pitch is not speed for speed’s sake. It is about building a new commercial lane for web offset in flexible packaging and film-based work.

“The Universal 850 is a platform that we are pushing for short to medium run for converters around the world,” says Bajaj. “This is web offset technology. The lowest cost of origination and for print runs of up to two tonnes of any- thing in film.”

Short runs need answers

Bajaj’s argument begins with a basic reset. The Universal 850 is not meant to compete with ultra-short-run digital, and it is not designed to be a gravure replacement for the highest-volume work. It is built to sit in the middle, where converters are often forced to compromise between cost, quality, and changeover discipline.

“We want to slot this solution aptly between digital which is only viable for ultra short run,” he says. “In simple terms, 100 kilos of material or below, the digital will be the in thing. But from the 100- to 2,000- or the 3,000- kilo market, the web offset can be a unique solution.” The target is short to medium runs where converters still want premium output, tighter repeatability, and better commercial control. Bajaj sees this as a segment that is expanding as brands launch more variants, manage inventory more carefully, and expect faster replenishment without losing shelf impact.

Application beats raw scale

Bajaj is direct about the mindset he believes the platform is built for. It is not aimed at converters chasing pure tonnage. It is aimed at converters looking for a niche where the margin story is stronger than the volume story.

“Application led,” he says. “We are not scale driven because we are not high volume production. We are helping converters find that niche where they can improve their bottom line with better margin.” That is also why Bajaj pushes back against the industry’s obsession with speed.

The Universal 850 runs at 200 to 300 metres per minute, but for certain applications the speed is deliberately lowered to protect process stability. “For some applications we have to go down to 150 metres per minute,” he says, citing water-based coatings for food-related applications. “Like I said we are not in the scale market. We are in the value-add market.”

Moving shrink to offset

If there is one application Bajaj repeatedly uses to explain the commercial logic, it is shrink film. “Shrink film is traditionally produced on rotogravure and now we are moving shrink film jobs to offset,” he says. The advantage, he argues, is not only quality, but the cost structure behind getting the job on press.

The core promise is lower origination cost, combined with print quality that can outperform rotogravure and flexo for specific demands. It is a statement that will interest converters who are under pressure to deliver premium graphics while also managing shorter runs and faster changeovers.

Bajaj also notes that web offset has a small market share in flexible packaging today, and the company’s strategy is to grow that share in the short to medium run space.

Hybrid in one pass

The Universal 850 is also being sold as a hybrid platform, not a single-process press. Bajaj describes it as a web-based solution that can bring multiple processes and modules into one workflow. “It brings you all the advantages of having a web solution - hybrid technologies of offset, flexo, digital or rotogravure,” he says, adding that converters can integrate foiling, lamination, inkjet and variable data printing inline.

The underlying benefit is simple. Fewer passes, fewer handoffs, fewer opportunities for variation. For converters operating in premium packaging, where design complexity is rising and delivery windows are shrinking, the idea of doing more in one pass becomes less of a nice-to-have and more of a production requirement.

Engineering challenges

Every new platform has one stubborn engineering problem that refuses to behave. For Bajaj, one of the biggest challenges is repeat change. In gravure and flexo, repeat flexibility is easier to achieve. In web offset, it becomes a more demanding design task. Bajaj says, “The toughest was the size repeat change,” he says. “We had to buildnew sleeves which are lightweight, low cost of change and long-term durability.”

The press uses aluminium sleeves with bearers, and Bajaj positions this as a long- life alternative to carbon fibre sleeves commonly used in flexo systems. “Our sleeves have been running for 10 years without a problem,” he says, adding that the company also holds a patent around the bearer design.

Automation that pays back

Bajaj is careful not to sell automation as a buzzword. He frames it as a direct response to waste, repeatability, and the reality that skilled operators are becoming harder to find. “Automatic ink key control is very important,” he says, pointing to the complexity of managing a wide press. “The wider press, we have 32 keys per print unit into seven. So, almost 300 keys to adjust. This is now fully automatic.”

The benefit is not convenience. It is time, repeatability, and less dependence on manual adjustment. He also highlights closed loop colour control as a key development area, describing it as a way to reduce waste and prevent operators from constantly chasing colour variation during production.

Colour control gets smarter

One of the new developments Bajaj flags is auto colour correction, which he describes as a first-time launch for this platform. “We are working with Baldwin to put an inline spectrophotometer to have a close loop colour control,” he says. He then goes a step further, outlining how the company is applying AI principles to make the press more predictive.

Offset, he notes, has an ink-water balance challenge, and the goal is to move from reacting to changes to anticipating them. “We want to predict it in time and to be able to pre-empt the change,” says Bajaj. “We would like to be proactive rather than reactive.”

For converters, the implication is clear. The more the press can stabilise colour without constant operator intervention, the more reliable it becomes as a production platform across varying conditions.

Stability across temperature swings

Bajaj brings the conversation down to the realities of running offset in the real world, where temperature shifts across a day can be dramatic, and not every market runs air-conditioned pressrooms. “When the winter was eight degrees, summer is 40 degree. The ink water balance becomes critical,” he says, describing how ambient conditions can push offset systems out of stability if not managed properly.

His answer is engineering discipline. Ink batteries and oscillators are chilled to maintain constant viscosity and temperature, and the next step is to move from open-loop control to closed-loop control with sensors and automated chiller management. The goal is to keep performance consistent, regardless of weather changes, shift length, or operator behaviour.

Handling films and board

The Universal 850 is positioned as a platform capable of handling substrates from 12 micron films to heavier board grades. Bajaj describes two separate challenges. On thinner films, the press must manage creasing and wrinkling risks. That requires tension stability and design changes such as idler rollers with grooves, especially during ramp-up and ramp-down.

On carton and heavier materials, the approach shifts to higher diameter idler rollers to support stable handling. Bajaj notes that the platform is being built with modularity in mind, allowing converters to configure the press to suit the application rather than forcing every job through a fixed architecture.

Process mix by design

The advantage of a hybrid platform is not having every process available. It is knowing which process should do what. Bajaj lays it out clearly. “For all the half-tones you should use offset, for all the varnishing coating you should use flexo, for the metallics you should use a rotogravure,” he says.

The point is not to throw every effect at every job. It is to build a process mix that fits the application and keeps the work-flow efficient. This also ties into the company’s modular approach. A gravure unit may not be necessary for every configuration, but it can be added if a converter’s application mix demands it.

Changeovers in minutes

Bajaj describes sleeve technology as central to performance, not only in print quality but also in changeover discipline. The sleeves are now pneumatically locked, reducing operator dependence and ensuring constant pressure. It also prevents damage that can occur when locking is done mechanically with variable force.

He says sleeve changes can be completed in under two minutes with a quick-change trolley, and the company is working on a larger trolley format to streamline the swap process even further. For converters, this matters because changeovers are often where planned productivity collapses. A press can be fast on paper and slow in reality if tooling change is inconsistent.

Inspection for compliance

Bajaj’s view on inspection is shaped by compliance realities, especially in food and pharma. He describes circumferential and transversal registration control as standard, and positions 100% defect detection as essential in workflows where missing data can lead to serious penalties. He shares an example from pharma leaflets, where a missing print incident triggered a major fine. In his telling, the lesson is that compliance is not theoretical. It is operational, and it can become expensive overnight.

The Universal 850, he says, uses defect detection cameras to check each label, each package, and each product for missing text and print defects automatically.

Energy savings by design

Energy is one of Bajaj’s strongest arguments, and he frames it at the machine design level rather than only through consumables. The press uses optimised motors, with individual motors for individual operations. The logic is that unused operations should not consume energy. He also points to drying as the biggest energy load, and positions water-cooled LED as the lowest consumption route for curing.

A major shift, he says, is moving from hot air drying to near infra-red (NIR) drying. “NIR uses 40% of the power,” he says. “If a hot air dryer was using 100 kilo-watts, we are only using 40 kilowatts.” Bajaj claims the total connected load is 60% lower than a conventional press, and suggests actual consumption will be lower still. He says the company has com- parative calculations and can share them.

Food packaging next frontier

Looking ahead, Bajaj says the company is watching food packaging closely, particularly direct food contact applications where UV use faces scrutiny in some markets. “We need to find a solution to be able to make food grade packaging with or without UV,” he says, pointing to research around alternative curing systems, including E-beam.

He acknowledges that E-beam brings higher capital cost and limited ink availability, but sees it as part of the direction the market is moving in. Solvent, he argues, is under pressure due to sustainability and recycling concerns, and the industry will need viable alternatives.

Bajaj notes that E-beam curing is already present in India, with 30–40 CI flexo presses running E-beam. He adds that UFlex alone operates 10 E-beam lines. Pet food, he suggests, is one segment where converters have had to adopt stricter curing choices, since direct contact and aggressive conditions can rule out UV entirely.

The uncomfortable ROI question

The Universal 850 platform, Bajaj says, can be three times the price of an equivalent flexo press from Europe. The only way to justify it is to build a disciplined ROI model around savings, waste reduction, repeatability, and the margin opportunity from the right applications. “You need to really work on your ROI numbers on how you can save and how you can justify the additional capital,” he says.

It is a blunt conclusion, but it matches the overall message. The Universal 850 is not being sold as a press that replaces everything. It is being positioned as a platform that gives converters a new lane, where the economics of short to medium runs can finally work without compromising quality, compliance, or efficiency.