Microdiamant and Eminess Technologies merge to form Pureon, the leading global supplier of surface finishing solutions for high-tech materials.
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Our success story
From Rudolf Spring through Microdiamant to Pureon
Our business has been in the hands of the Spring family for three generations. To us, family means showing true dedication and a high degree of involvement in the wellbeing of our company. Below you can find the most important milestones that made Pureon what it is today: the leading global supplier of surface finishing solutions for high-tech materials.
2021

2020

Acquisition of US-based Eminess Technologies, a technology leader specializing in advanced critical surface polishing consumables. With this acquisition, Microdiamant doubles the number of employees to 120. The combined global footprint provides improved access to both the U.S. market as well as the European and Asian markets. The two companies' complementary product ranges and combined know-how enables Microdiamant to offer seamless surface finishing solutions from a single source.
2019

Founding of Chinese subsidiary Microdiamant China Co., Ltd in Suzhou City.
2017

Subsidiary company in Japan trades now under the name Microdiamant Japan. Expansion of the range. As well as micron diamond powders and suspensions, grinding pads, diamond compounds and polishing pads are now available.
2017

Opening of the enlarged Surface Lab in Lengwil, Switzerland.
2016

Launch and patenting of IRINO composite polishing pad.
2015
Launch of SPLENDIS universal-use diamond suspensions.
2014
Former Mypodiamond Inc. is renamed to Microdiamant USA, Inc., now offering the full Microdiamant product portfolio to the US market.
2014

Microdiamant GmbH in Kempen, Germany, doubles its production and office surface by moving into its own, new facility.
2014

Launch of SQUADRO, the new generation fine grinding pad.
2012

The Swiss Venture Club's Entrepreneur Award Ostschweiz 2012 goes to Microdiamant.
2012
1952-2012: Microdiamant celebrates 60 years of "diamond fever".
2011
Expansion of micron diamond production capacity to 100m carats per year.
2010

Foundation of Microdiamant GmbH in Kempen, Germany. Acquisition and integration of Oberflächentechnologien Ziesmer.
2008
Launch of Microdiamant's inhouse R&D department.
2006

XP nano-cluster diamond pushes the limits in high-tech applications.
2005
Daniel and Martin Spring acquire Spring Holding AG by MBO.
2003
Invention of GAF (guaranteed agglomerate-free) process for simple preparation of agglomerate-free diamond suspension.
2002

Rudolf Spring AG is renamed to Microdiamant AG.
1999

Third-generation Daniel and Martin Spring take over Rudolf Spring AG.
1999

Acquisition of the Mypolex polycrystalline diamond business from DuPont, USA, the inventor of polycrystalline diamond.
1997
Implementation of a Total Quality Management based management system.
1995

Invention of GAF (guaranteed agglomerate-free) Liquid Diamond.
1995

The company moves into its new headquarters in Lengwil, Switzerland, more than doubling its production capacity.
1990

The companies of the Spring Group are united in the Spring Holding company.
1987

As the first micronizer worldwide, Rudolf Spring AG implements an ISO 9000 certified quality management system.
1974

Kurt Spring joins the company which he will lead for the next 25 years. Under his leadership, Rudolf Spring AG transforms into a globally active company.
1970
Invention of the first stable diamond suspension.
1965

Rudolf Spring AG expands into its first own laboratory building dedicated to the micronizing of diamond powders.
1952
The company is founded by Rudolf Spring under the name Rudolf Spring AG.