In the world of electrical insulation, quality and performance are paramount. The newest addition to our range of high-quality electrical insulation papers, diamond-dotted paper, is designed to offer better insulation, longer lifespan and improved performance for transformers.
Diamond-dotted paper is vital in transformers for its insulating properties, durability and ability to improve performance and lifespan, making it a key component in reliable and efficient transformer operation. With decades of expertise in creating high-quality EIP base papers, we’ve leveraged our expertise in printing to offer the market high-quality Diamond Dotted Paper.

superior insulation and longevity
What truly sets our diamond-dotted paper apart is its Degree of Polymerization (DP). With a DP of 1400, our paper leads the market, well above the industry standard of 1200. A higher DP gives customers the advantage of a paper that is stronger and more durable. For transformers, this means a longer lifetime and ensures transformers operate more efficiently for extended periods, ultimately leading to fewer service requirements and reduced maintenance.
the lowest tan delta value on the market
Our Diamond-Dotted Paper features the lowest tan delta value on the market, ensuring better electrical insulation and minimizing energy loss. This leads to enhanced transformer performance and greater operational reliability, giving you confidence in your transformer’s efficiency and longevity.
consistent high-purity papers
We carefully select only the highest-quality raw materials for our Diamond Dotted paper, ensuring they meet the highest industry standards. By sourcing pulp from sustainably managed sources, we maintain strict control over the quality of our materials, guaranteeing top-tier performance.
expertise in base paper and in-house printing
For decades, we’ve honed our expertise in producing premium base papers for transformer insulation. Now, we’re leveraging our in-house printing capabilities to apply the resin directly onto the paper, offering a seamless, efficient solution for your transformer needs. By controlling both the quality of the base paper and the resin printing, we ensure consistency and superior performance every time.
exceptional mechanical properties
Engineered to withstand high pressure and extreme temperatures, our paper maintains its strength and structure even in the most challenging environments. This durability ensures consistent, reliable performance under demanding conditions, making it a dependable choice.
expertise in base paper and in-house printing
For decades, we’ve honed our expertise in producing premium base papers for transformer insulation. Now, we’re leveraging printing expertise to apply the resin directly onto the paper, offering a seamless, efficient solution for your transformer needs. By controlling both the quality of the base paper and the resin printing, we ensure consistency and superior performance every time.

a new standard in transformer paper
With decades of industry know-how and a commitment to innovation, we’re proud to offer a product that truly stands out in the market. We’re excited to bring you a product that not only meets but exceeds the expectations of today’s transformer industry. If you're ready to upgrade your transformer paper and improve efficiency, let’s get started—trust our quality and experience to power your success.
see our papers in action!
See our Diamond Dotted Paper and other insulation papers at this year’s CWIEME. Two of our partners will be showcasing our papers and team delfort will be on-site to assist.
Where: CWIEME Berlin, Germany
When: June 3-5, 2025
The H-J Family of Companies at booth 27B30
Guerzoni at booth 32D29
about our partners
The H-J Family of Companies is a global leader in the manufacturing and supply of products and solutions to the heavy electrical industry. These components support the transformer, switchgear, regulator, recloser and breaker industries, along with specialties in the utility market.
Guerzoni produces and distributes insulating and flexible material for transformers, flat wires and electrical motors. For over 30 years they have guaranteed reliability and trust in the Italian and European electromechanical field
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Inventing and revolutionizing paper products is our passion. Together with you, we will find and create the paper that perfectly meets your needs.