Sustainable Printing - A study by Heidelberg, as a forerunner in environmental protection for over 15 years, confirms that 40 per cent of print shops place great value on environmental protection...
Heidelberg steps up its environmental commitment
A study by Heidelberg confirms that 40 per cent of print shops place great value on environmental protection. 'Our customers set great store by environmental protection,' confirms Dr. Jürgen Rautert (pictured), director for Engineering and Manufacturing at Heidelberg. 'We can show that protecting the environment and earning money are not mutually exclusive. In fact, the investments required to secure a better future for our planet pay for themselves very quickly.'
Heidelberg made environmental protection one of its corporate objectives back in 1992. The company was the first to receive the industry’s eco-certificate for its foundry in Amstetten in 1996. Since then, environmental management systems compliant with EMAS and later ISO 14001 have been installed at all of Heidelberg’s development and production sites. Independent experts check each year whether the company’s facilities comply with the legal requirements and voluntary commitments.
Savings that can be made using ecological printing. Note: The inset (blue & grey) bar chart top left in the illustration displays the bars in proportion - clearly indicating that waste paper is by far the largest single contributor, with ink following as the second largest and energy in a clear third postition - well ahead of the other contributing factors.
'We aim to make printing more environmentally friendly and to ensure that the public is aware of this fact,' explained Dr. Rautert. 'Having pursued an active policy of environmental protection for the past 11 years, our press production processes are already very environmentally friendly. However, the focus now is on minimising the presses’ environmental impact when in use at customers’ sites. Therefore, our developers are currently working on concepts that will keep environmental pollution in print shops to a bare minimum. Our Print Media Academy network also provides support for the implementation of appropriate production methods,' continued Rautert.
If customers implement all the measures suggested by Heidelberg for environmentally friendly production, numerous reductions can be achieved. CO2 emissions generated by material consumption and printing processes can be reduced by over five per cent, paper waste by up to 80 per cent, energy consumption by over 15 per cent and waste by up to five per cent. For the Speedmaster XL105-6+L, these reductions are equivalent to a total annual saving of around 210,000 Euro - without even factoring into the calculation the savings made on the press through shorter makeready times.
Input/output analysis of a press using the example of a Speedmaster XL 105 six-colour press with coating unit and dryer.
Reduced paper waste has the biggest impact on environmental protection The biggest environmental factor in sheetfed offset printing is startup waste - no other parameter has such a big impact on a press’s environmental performance. If we consider that 600 sheets of startup waste are created on average per job, a press in 3B format running in three-shift operation creates over 280 metric tons of waste a year. This corresponds to around 300 tons of CO2 emissions each year. The additional waste created in the postpress stage is not even factored into this equation.
Heidelberg offers a range of solutions to cut this wastage - primarily the modules of the Prinect workflow, including the Prinect Prepress Interface for presetting ink zones on the press, the Prinect Color Assistant for storing specifications for inks and paper, and the spectrophotometric inline colour measuring and control system Prinect Inpress Control. Combining these Prinect modules cuts the number of pulls required during setup to one or two. This can save up to 400 sheets of waste paper per print job or up to 190 tons of paper a year.
The new Anicolour inking unit technology is today’s most radical solution for cutting waste paper. It is available on the Speedmaster SM 52 platform and was awarded the prestigious PIA/GAFT Award this year.
New Star peripherals cut power consumption The power consumption of a press is the second most important environmental factor after paper waste. A press in 3B format employing six colours, a coating unit and dryers has an average power consumption of 140 kilowatts. The power generated for this purpose is responsible for the emission of 290 tons of CO2 per year. The main drive, dryers and air supply technology use the most energy. Heidelberg boosts environmentally friendly production through its Star peripherals, which together help reduce energy consumption significantly. For example, the newly-developed AirStar 3000 air supply cabinet uses a turbo radial blower that requires up to 50 per cent less power than previous systems. At present, its efficiency rating is almost 80 per cent, a value unprecedented in the sector today. Furthermore, the CombiStar 3000 Pro from Heidelberg is a combination unit that cools the machine’s printing units in moderate climates for most of the year and does so without additional active cooling, ie using only the print shop’s ambient air.
The distance between the dryer and the sheet in the Preset Plus Delivery has been reduced by more than two centimeters. Each centimeter means less power is lost during the drying process. In practical terms, this amounts to an energy saving of 10 per cent in conventional printing when compared to the best rival system and as much as 25 per cent in UV printing. With the new DryStar 3000 LYYL, up to 30 per cent of the hot air is recirculated, which cuts energy consumption still further.
Always differentiate between the power input and power consumption It is important to differentiate between the power input and the real power consumed. 'Our innovative energy recovery system in the DryStar 3000 LYYL means that we have to heat the air with maximum energy at the start of production, but can then reduce the power during long-term operation to make optimum use of the heat from the waste air,' explained Dr. Rautert. The same principle applies to various other components in the machines - it is always the maximum power required for the most critical job that is made available, but in practical applications, the use of frequency regulation and innovative control technology means that this peak power is only required in a few situations. Numerous measurements have confirmed that the Speedmaster requires much less power per sheet than other machines - and that despite its higher specifications. In future, Heidelberg will campaign for press specifications to quote the power consumption as standard.
New product: DryingMonitor - the world’s first measuring system to record drying qualities for sheetfed offset The new Star product DryingMonitor is used to assess a sheet’s drying quality. As a result, it is now possible to minimise the performance and energy consumption of the patented DryStar dryers without worrying about the sheets sticking together. As the DryingMonitor makes for drying processes with less heat transfer, this means it is also less likely that the coating will yellow due to excess heat or that the printing stock will distort.
Breakthrough in the reduction of powder and alcohol A further key parameter in environmentally friendly production is the reduction of emissions, regardless of whether these are volatile organic hydrocarbons (VOCs) or powder. A new CleanStar process-air system is now available for the Speedmaster CD 102 and XL 105 units, which cuts the level of fine dust in the print shop to a fraction of the legal limit.
The use of alcohol in dampening solutions is another key area. 'In Germany, only 15 per cent of print shops use reduced-alcohol solutions. Unfortunately the others continue to use dampening solutions containing between 8 and 15 per cent alcohol,' underlined Dr. Rautert. 'A major reduction in environmental impact would be achieved if all print shops used dampening solutions containing just three per cent alcohol. The ecological "sweet spot" in offset printing, ie the balance between VOC emissions and environment-related additional outlay for energy, increased cleaning and startup waste, is achieved with a concentration of three per cent rather than the widely publicised zero per cent.'
A recent market survey showed that of the one hundred Speedmaster XL 105 presses sold in Germany to date, 60 per cent already use reduced-alcohol solutions containing between zero and six per cent alcohol, with most running at the 'sweet spot' of three per cent.
Note: The new Sustainability Report can be ordered by e-mail from: environment@heidelberg.com or by fax at +49 (0)6221 92 50 69.
The document can also be accessed on the Internet Environmental data, contacts and general information on the company's production and development sites are also available online from the Download Centre (at the foot of the Home Page) of Heidelberg's own Website by using the link below.
Explanation of the abbreviations:
EMAS: Eco-Management and Audit Scheme, also known as the EU eco-audit or eco-audit. EMAS was developed by the European Union and is a voluntary initiative comprising environmental management and eco-audits designed for organisations who want to improve their environmental performance. The EMAS Regulation places a lot of emphasis on businesses taking responsibility for implementing measures that have a direct and indirect impact on the environment.
ISO: International Organisation for Standardisation
VOCs: Volatile organic compounds are substances containing carbons that either vaporise easily or already exist as a gas at low temperatures (eg room temperature).
B2 format: 700 x 1000 millimetres (27.56 x 39.37 inches) format.
A study by Heidelberg confirms that 40 per cent of print shops place great value on environmental protection. 'Our customers set great store by environmental protection,' confirms Dr. Jürgen Rautert (pictured), director for Engineering and Manufacturing at Heidelberg. 'We can show that protecting the environment and earning money are not mutually exclusive. In fact, the investments required to secure a better future for our planet pay for themselves very quickly.'
