Bow Maker Notes on iPhone: Pernambuco Assessment, Camber Records & Playing Evaluation Notes

Bow making is one of the most demanding precision crafts in the instrument world. A concert-quality violin bow is made from a single stick of pernambuco selected for specific resonance characteristics, bent to a precise camber profile, and balanced to within tenths of a gram. The parameters that produce a bow with presence, clarity, and ease of playing are understood empirically — by making many bows, documenting the variables, and learning what the outcomes reveal about the relationship between stick geometry and playing quality.

Why Bow Makers Need Structured Notes

Bow making requires mastery of material, geometry, and acoustics simultaneously. The camber profile that works well in one stick behaves differently in another because the wood's stiffness varies. The frog placement that produces ideal balance in one model may need adjustment in another. Without documented records connecting material assessments to finished bow character, each bow's lessons disappear when the next one begins.

What to Capture in Nemos

Pernambuco and Wood Assessment For each blank assessed: - Source and supplier - Visual grain: straightness, figure, density rings - Tap-tone character (pitch, sustain, resonance quality) - Stiffness assessment: static flex at standard points - Coloration and density estimate - Intended use: violin, viola, cello, bass

Wood assessment notes for pernambuco are especially critical given the material's scarcity and cost. Documented assessments across a collection of blanks help identify the selection characteristics that predict the best playing bows.

Camber and Taper Measurements For each bow in progress: - Octagonal taper: measurements at stick points (frog, quarter, middle, three-quarter, tip) - Round section dimensions where applicable - Camber profile: depth at quarter and mid-point - Head neck and throat dimensions - Overall length and balance point before hair

Geometric documentation creates the reference for reproducing a successful bow profile and understanding how camber shapes playing character.

Weight and Balance Records - Weight at each stage (blank, shaped, before hair, finished) - Balance point before and after hairing - Tip weight - Final balance and weight at delivery

Weight and balance notes connect material decisions to the physical playing properties the player experiences.

Hair Tension and Rehair Records For each hairing and rehair: - Hair source and grade - Number of hairs (violin, viola, cello range) - Tension at optimal playing tension - Stick reaction under tension (any twist, camber change) - Re-hair notes for returning bows: hair condition found, what was changed

Hair records capture a parameter that significantly affects playability but is rarely documented systematically.

Playing Evaluation Notes After completion, record playing assessment: - Response (ease of articulation across string crossings) - Sound production (projection, clarity, presence) - Weight distribution character (tip-heavy, balanced, neutral) - Spiccato and sautillé behavior - Player or student feedback if a third party assessed

Playing evaluation notes close the loop between geometry decisions and acoustic outcome — the most valuable feedback for improving the next bow.

Repair and Restoration Notes For bow repairs: - Damage assessed (stick crack, camber loss, tip damage, winding condition) - Repair approach and materials - Post-repair condition assessment

FAQ

Can I use Nemos offline in a workshop? Yes. Full offline functionality. Notes sync when WiFi is available.

How do I capture tap-tone observations for pernambuco? Note pitch (relative or absolute), sustain character, and whether the resonance feels focused or diffuse. Consistent vocabulary across blank assessments makes the notes comparable over time.

Is Nemos useful at international bow fairs or maker events? Yes — rapid assessment notes at fairs, with photos attached, create a reference for the blanks and finished bows you handled. Far more retrievable than memory.

How do I organize notes across a bow inventory spanning multiple models? Title notes by bow model and maker sequence number. Tags by string instrument type (violin, viola, cello) and wood type organize by axis. Search finds any characteristic instantly.

What about pernambuco provenance documentation? Log CITES documentation reference for each blank. Pernambuco is an Appendix II species — documentation tracking is both legally required and professionally important.

Why not just rely on the maker's memory and eye? Memory fades over decades of work. Notes accumulate into a technical library that compresses the learning curve — both for your own development and for students learning from your experience.

Related Reading

• /blog/luthier-notes-iphone — instrument building and acoustic craft documentation
• /blog/piano-technician-notes-iphone — precision mechanical service and voicing documentation
• /blog/gemologist-notes-iphone — rare material assessment and provenance documentation
• /blog/clockmaker-notes-iphone — precision craft documentation and historical instrument records

Sources

• Bow making technical resources: International Pernambuco Conservation Initiative (IPCI) and American Federation of Violin and Bow Makers (AFVBM) technical publications
• Bow acoustics research: Catgut Acoustical Society publications and Journal of the Acoustical Society of America bow mechanics studies

Download Nemos free on the App Store.