In-House Refill Production
Silktech – Smooth by Design
For over 35 years, we have been manufacturing our high-quality ballpoint pen refills entirely in-house in Wolfach in the Black Forest. This enables us to guarantee the highest quality ‘Made in Germany’.
Our refills impress with:
- High-quality, document-proof paste → filled into a self-manufactured tube made of recycled polypropylene (rPP)
- the precisely crafted tip with an extremely hard tungsten carbide ball → for a particularly smooth writing experience.
With over 25 million refills produced in-house each year, from standard to large-capacity, they are used worldwide. And the best part: Our refills are available separately, for sustainable writing with a system.

Refill Silktech L

The classic in the Klio-Eterna refill range. The Silktech L stands for durability and consistent writing comfort with the usual smooth writing experience. The refill tube of the sustainable large-capacity refill is made from recycled polypropylene, offers a writing length of 3,000 m (± 10%) and is the standard in all Klio models manufactured in-house. It has a lead-free stainless steel tip with an embedded 1.0 mm tungsten carbide ball and is filled with ink paste of medium viscosity in blue or black. In addition, it complies with the guidelines of ISO 12757-2 (document-proof), is REACH-compliant (1907/2006) and contains no hazardous substances according to SVHC.
- Lead-free stainless steel tip
- Made from recycled polypropylene
- Writing performance: 3,000 m (± 10%)
- Line width: ø 1.0 mm
- Writing colour: blue or black
- ISO 12757-2 (document-proof)
- REACH compliant
- No hazardous substances according to SVHC
- Shelf life: 2 years

Refill Silktech XL

Premium version of our in-house Silktech refill family. The Silktech XL refill guarantees lasting writing comfort over a writing length of 5,000 m (± 10%). With its smooth stroke and consistent writing style, it impresses across the board. The high-quality large-capacity plastic refill has a lead-free stainless steel tip with an embedded 1.0 mm tungsten carbide ball and is filled with medium-viscosity ink paste in blue or black. In addition, it complies with the guidelines of the ISO 12757-2 standard (document-proof), is REACH-compliant (1907/2006) and does not contain any hazardous substances according to SVHC.
- Lead-free stainless steel tip
- Made from recycled polypropylene
- Writing performance: 5,000 m (± 10%)
- Line width: ø 1.0 mm
- Writing colour: blue or black
- ISO 12757-2 (document-proof)
- REACH compliant
- No hazardous substances according to SVHC
- Shelf life: 2 years

Refill Multifill P
Sets higher standards in terms of writing performance. The Multifill P refill has the largest capacity of all refills available from Klio-Eterna. With an exceptional writing length of 8,000 m (± 20%), it guarantees long-lasting use for the user and makes recurring refill changes a thing of the past. The high-quality large-capacity metal refill has a 1.0 mm tungsten carbide ball and is filled with ink paste of medium viscosity in blue or black. In addition, it complies with the guidelines of the ISO 12757-1 standard, is REACH-compliant (1907/2006) and does not contain any hazardous substances according to SVHC.
- Writing performance: 8,000 m (± 20%)
- Line width: ø 1.0 mm
- Writing colour: blue or black
- ISO 12757-2 (document-proof)
- REACH-compliant
- No hazardous substances according to SVHC
- Shelf life: 2 years

Refill Multi-Gel
The Multi-Gel refill impresses with its smooth and fluid writing experience. The quick-drying ink prevents smudging and is therefore also ideal for left-handed users. The 0.7 mm ball in the tip of the high-quality plastic refill ensures a fine line width and the typical gliding feel of a gel pen. Equipped with a corrosion-free stainless steel tip and filled with water-based ink in blue or black, the Multi-Gel refill complies with ISO 27668-1 and ISO 27668-2 standards and is REACH-compliant (1907/2006).
- Writing performance: 700 m
- Line width: ø 0.4 mm
- Writing colour: blue or black
- ISO 27668-1 or ISO 27668-2
- REACH compliant
- Shelf life: 6 months

Rollerball Refill RO-S
Combines the advantages of a fountain pen with the simplicity of a ballpoint pen. This refill features a fine line and the typical smooth writing feel of a fineliner. The high-quality RO-S rollerball refill is made of plastic, has a corrosion-free stainless steel tip and is filled with water-based ink in blue or black. The refill complies with the guidelines of ISO 14145-1, is REACH-compliant (1907/2006) and does not contain any hazardous substances according to SVHC.
- Writing performance: 600 m - 800 m
- Line width: ø 0.7 mm
- Writing colour: blue or black
- ISO 14145-1
- REACH compliant
- No hazardous substances according to SVHC
- Shelf life: 9 months
