Rotech Makes Lite Work

Stuart Pritchard January 28, 2019

Upping the ante on artisan food production, Rotech’s RF Lite with TIJ takes the time and tedium out of choc-coding…

At Pump Street Chocolate, the iJet TIJ coder is programmed to print a best-before date 14 months from production

It is easy to assume that labour-intensive artisanal food operations do not benefit from automated or semi-automated solutions in the same way that a technology-heavy manufacturer might. But in fact, as Suffolk chocolate maker Pump Street Chocolate demonstrates, automating the process of manual date-coding by installing a RF Lite feeding system with iJet thermal inkjet (TIJ) coder makes a huge difference on production efficiency, freeing up skilled workers for core duties.

While the team of six full-time workers in Pump Street’s chocolate room does use a certain amount of machinery, it is very much a hands-on operation. As one of the few UK producers going all the way from ‘bean to bar’, it requires maximum workforce availability for a range of processes, from roasting, winnowing, grinding and conching to tempering. That is before the team even starts to mould and pack the chocolate.

So, when at the end of last year the Orford-based company began to produce smaller 20g bars to complement the existing range of 70g bars, it soon became clear that automated coding would be a necessity. The full-size bars use a zipper-resealable sachet printed in-house with a batch code and best-before date, which also acts as a tamper-evident seal. The smaller tear-open sachets for the 20g bars, typically destined for the coffee-shop and hotel market, required a different solution.


Rotech’s RF Lite feeding system is ideal for small-scale food producers like Pump Street Chocolate

“We were literally writing the sell by date on to the sachet by hand,” says Sally Jones Customer Manager. “Every month we make batches of around 4000 bars, and it was taking up hours of our time. Now, in 20-minutes or so, the Rotech machine prints what it would have taken us three days to write by hand.”

Rotech’s RF Lite feeding system is ideal for small-scale food producers like Pump Street Chocolate which are automating for the first time. It pulls individual packs from a hopper, positions them ready for coding with the iJet TIJ system, before transferring them to a stack of coded sachets. The feeding system has a linear speed of up to 60m per minute.

“The speed and the efficiency of the system were both important, as well as its ability to adapt to other products further down the line,” says Sally. The company is developing packs of couverture chocolate and chocolate powders for supply to the foodservice sector.

“From order to delivery and installation, it all happened very quickly,” she adds. “We were shown how to operate it, and it’s incredibly user-friendly. I can include additional information such as batch codes by making a simple change from my computer.”


In 20-minutes, the Rotech system prints what it would have taken Pump Street Chocolate three days to write by hand

TIJ coding is often unjustly overlooked in favour of other coding technologies such as thermal transfer and continuous inkjet (CIJ). Rotech highlights the lower cost of TIJ, when compared with CIJ on the basis of cost per 1000 codes. As a general rule, says the company, the cost with CIJ can be over one and a half times as much.

At Pump Street Chocolate, the iJet TIJ coder is programmed to print a best-before date 14-months from production. “Because the machine automatically updates itself, we tend to use it as our point of reference when it comes to date coding,” Sally says.

The example of Pump Street demonstrates other benefits of TIJ over alternative print technologies, according to Rotech. In particular, because it is an on-demand system, there is no cost or wastage when the coder is not in use. And because the entire printhead and ink supply system is replaced with each new cartridge, there are none of the maintenance requirements or mess associated with CIJ.

Meanwhile, the quality and versatility of TIJ ink systems is great, providing high adhesion even on high-gloss surfaces and a wide range of shades all the way to high-contrast black.