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The Art of Refining: Schopper-Riegler Degree (°SR) Deciphered by Noviprofibre 🔬📈 - Noviprofibre

The Art of Refining: Schopper-Riegler Degree (°SR) Deciphered by Noviprofibre 🔬📈

By Noviprofibre | 11/03/2026

In papermaking, refining is a critical step. But how do you measure its real impact on the pulp? That’s where the Schopper-Riegler degree (°SR) comes in.

This index quantifies the drainability of a fiber suspension. By measuring the rate at which water drains from the pulp, we gain vital insights into:

✨ Specific surface area of the fibers.

💧 Fiber swelling.

🧠 Hydration capacity.

It’s a window into the final properties of your paper. To achieve this measurement with absolute reliability and consistency, Noviprofibre presents its Pneumatic Schopper-Riegler tester.

Why choose our solution?

  • Reliability & Precision: A proven method for accurate results between 10 and 90 SR.

  • Ergonomics & Durability: Stainless steel design, pneumatic activation, and direct reading on a graduated cylinder.

  • Expert Control: Adjustable cone rise speed (standard 100 mm/s) to suit your specific needs.

  • Calibrated Orifice: Fully replaceable for long-term accuracy.

Mastering the °SR degree means mastering the quality of your production.

🚀 Ready to optimize your refining process? Contact us to learn more about our measurement solutions.