New Inkjet Printing System with Fluorescent Clearcoat for Luminous Results

Summary of the press release:

  • Prints more than 600 coins per hour in a large automated, productive printing process
  • Uses specially tested inks that provide optimal adhesion and abrasion resistance when applied to metal substrates
  • The double table design enables parallel loading / unloading and printing with a cycle time of approx. 180 seconds per compartment

Original press release:

THIEME presents a highly productive inkjet printing system for multi-colored printing on coins and bars

Teningen, March 2021 – The market for coloring coins and other precious metals is growing, which makes an efficient and economical printing process all the more important. THIEME GmbH & Co. KG, a printing specialist in southern Germany, has made a quantum leap in efficiency with an innovative digital coin printer. This unrivaled system is the first of its kind to print more than 600 coins per hour in a largely automated, highly productive printing process.

Colored coins Coins with partly colored coin motifs are spectacular showpieces that are becoming more and more popular with collectors as well as other users. The application of color gives variety to the otherwise limited design options for minting, which is why almost all official mints now offer colored coins. In order to achieve perfect printing results on three-dimensional embossed reliefs, the coin blanks must be precisely aligned before printing. In addition, the applied ink must be stable enough for the colored coins to survive the final roller polishing process intact.

So far, most coins and other precious metals have been screen or block printed. In cooperation with a German mint, Thieme has developed a new type of digital coin printer that speeds up the printing process considerably. The unique inkjet printing system uses specially tested inks that provide optimal adhesion and abrasion resistance when applied to metal substrates. The system offers a total of seven color channels (CMYK, white, primer and top coat); A fluorescent clear lacquer is also available for special lighting effects.

Efficient loading, automatic alignment

Extensive automation and easy loading are essential for an efficient printing process. The Thieme coin printer uses a completely new approach with interchangeable adapter compartments into which the operator can load a large number of coins or bars at the same time. The double table design enables parallel loading / unloading and printing with a cycle time of approx. 180 seconds per compartment. This corresponds to 640 coins per hour if each compartment is loaded with 32 coins.

The innovative automatic alignment system ensures a further increase in efficiency: thanks to the digital image alignment, the blanks can be inserted in the printing machine in any position. The saved print layout is automatically adjusted to the orientation of each individual coin by scanning. Digital alignment only takes one to two seconds per coin and is therefore much faster than mechanical holder positioning in conventional printing processes. We have increased throughput many times over what was previously possible, explained Oliver Beck, Head of Sales Printing Systems at Thieme. The innovative system also offers unbeatable printing costs, he added: Ink costs less than a cent per 32-millimeter coin.

High print quality and productivity

Print quality has not been sacrificed for better productivity. On the contrary, the print resolution of 800 x 1200 dpi can color the finest embossed motifs in high quality. The automatic alignment is also highly precise with a repeat accuracy within 0.1 mm. Our new inkjet printing system will revolutionize the current process of coloring coins, promised Oliver Beck. The printing process used to be quite tedious. In the future, coins and metal substrates can be colored far more efficiently and flexibly while maintaining high quality standards. This gain in efficiency is crucial in times of increasing demand: this is a real quantum leap for mints.


THIEME Engineering Works was founded in 1960 by Werner Thieme, who laid the foundation for today’s company. THIEME GmbH & Co. KG currently employs around 350 people worldwide in the printing systems and polyurethane divisions. The headquarters of THIEME is located in Teningen near Freiburg in southwest Germany. The company serves its customers with sales and service subsidiaries in France and the USA.

Editorial contact:
Simon Hebding
Robert-Bosch-Strabe 1
D-79331 Teningen
Tel .: +49 (7641) 583 532
Fax: +49 (7641) 583 110

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