Attributes

Brand	-
Category	Musical Instruments/Guitars/Pianos/Accessories / Rosin and Other Low-Value Consumables
Origin	-
Brand	OTTO
Model Series	MR15 / MR25 / MR35 / MR50
Origin	Germany
Compatible Instruments	Violin, Viola, Cello, Erhu
Dust Level	Dust-Free Formula
Color	Light Amber to Dark Brown (varies by model)
Texture	Smooth and Hard
Weight per Cake	Approx. 28g
Packaging	Protective Cloth Pouch Included
Ideal For	Professional and Student Musicians

6 reviews

Anonymous

Mar 30, 2026

Rating: 5/5

Standard for a reason

I have been using OTTO rosin for over a decade. This dust-free version is even better than the old formula. It lasts a long time and ensures consistent performance across all four strings of my violin.

Anonymous

Mar 26, 2026

Rating: 5/5

Perfect for my Erhu

Finding good rosin for the Erhu can be tricky, but this works beautifully. The MR25 gives just the right amount of friction without making the sound too harsh. Very satisfied with this purchase.

Anonymous

Mar 22, 2026

Rating: 4/5

Good value for money

Solid product. The packaging was secure, and the cloth pouch is a nice touch to keep things tidy in my case. It's not the cheapest option, but the longevity makes it worth the price.

Anonymous

Mar 15, 2026

Rating: 5/5

Clearer tone production

My viola sounds much clearer now. The rosin applies evenly and doesn't clump up. I appreciate that it is genuinely dust-free as advertised, keeping my varnish safe.

Anonymous

Mar 15, 2026

Rating: 5/5

Excellent grip without the mess

I switched to the OTTO MR50 for my cello and the difference is night and day. It provides incredible grip on the bow hair, yet my instrument stays remarkably clean. No more white dust clouds after a long practice session.

Anonymous

Mar 05, 2026

Rating: 4/5

Great quality, hard to apply initially

The rosin itself is top-notch German quality. It took a few tries to get it to bite on my new bow hair because it is quite hard, but once it did, the tone became rich and warm. Highly recommend for serious players.

5 FAQ

Q: What is the main difference between MR35 and MR50?

A: The primary difference lies in the hardness and grip level. MR50 is harder and provides a stronger grip, ideal for soloists or lower-pitched instruments like cellos, while MR35 is slightly softer for a warmer tone.

Q: How often do I need to reapply this rosin?

A: Frequency depends on playing time, but generally, applying rosin every 4-6 hours of play is sufficient. Since this is a hard rosin, a little goes a long way.

Q: Which model number should I choose for a beginner violin student?

A: For beginner violinists, we typically recommend the OTTO MR15 or MR25. They offer a balanced grip that helps produce sound easily without being too aggressive on the strings.

Q: Is this rosin suitable for synthetic core strings?

A: Yes, the OTTO MR series is versatile and works excellently with both gut and synthetic core strings, providing reliable traction regardless of the string type.

Q: Does the package include the cloth for wiping the instrument?

A: Yes, each cake of rosin comes wrapped in a protective soft cloth pouch, which can also be used to gently wipe excess residue from your instrument.

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