Martin · Guitar Strings
Martin Acoustic 80/20 Bronze Guitar Strings
Lower-concern product; acoustic guitar strings have no typical PFAS application.
Martin's 80/20 bronze strings are primarily copper-zinc alloy wire with no known water-repellent, non-stick, or stain-resistant coatings that would indicate PFAS use. Guitar string manufacturers do not typically apply PFAS treatments. Martin makes no PFAS claims, but the material category itself poses minimal PFAS risk.
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80/20 bronze wire (copper/zinc alloy)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Martin 80/20 Bronze strings are wound from a copper-zinc alloy (80% copper, 20% zinc) over a steel core. This composition is chemically stable under normal playing conditions and does not leach toxic metals into the surrounding environment or skin under typical acoustic use. The alloy is chosen for acoustic brightness and durability, not for any hazardous functional property. Once wound and set, the bronze coating does not degrade into particles or fumes during normal playing.
The brand's record and disclosure
Martin Guitars is a long-established U.S. manufacturer with no public safety recalls or toxicity controversies on record for acoustic strings. The company does not actively disclose PFAS sourcing or avoidance policies, but this is typical for the string category and reflects low regulatory pressure rather than identified risk. Martin's reputation rests on consistent product quality and material consistency rather than explicit safety certifications.
How it compares in its category
80/20 bronze is one of the two dominant acoustic string materials, alongside phosphor bronze; both are chemically inert and have equivalent safety profiles. Martin is a premium tier producer; budget alternatives (often unlabeled alloy winding) carry slightly higher uncertainty about material composition, but no documented safety difference exists. Nylon and synthetic strings present different wear profiles but no inherent safety advantage over bronze.
If you buy it
Store strings in a cool, dry place to slow corrosion of the bronze coating, which is cosmetic rather than safety-critical. Replace when tone dulls, tuning stability fails, or strings break, typically every 1-3 months depending on play frequency. Wash hands after playing if skin sensitivity to copper is known (rare but documented in some users). No special disposal precautions are needed; used strings can be recycled as scrap metal.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
copper-zinc alloy leaching
80/20 bronze does not leach copper or zinc into skin, mouth, or ingestion pathways under normal playing. No established exposure route exists for acoustic strings.
metal dust or particulate generation
Acoustic bronze strings do not shed particles, generate fumes, or fragment under normal playing tension. Manufacturing debris is not present in finished retail strings.
nickel or cadmium impurities
Martin's 80/20 specification does not include cadmium; nickel content in zinc sources is not reported and is not a typical concern for bronze alloy strings at this price tier.
skin or contact sensitization
Copper allergy is rare but documented; individuals with copper sensitivity may experience mild dermatitis from prolonged string contact. This is a personal sensitivity issue, not a product defect.
corrosion byproducts from storage
Oxidation of bronze in humid storage produces a surface patina, not a health hazard. This is purely cosmetic and does not affect playability or safety.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 82% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Guitar Strings
Martin
Retro Acoustic Guitar Strings
Phosphor bronze, stainless steel, nylon wound
Lower concern, acoustic guitar strings typically use established metals and nylon without water-repellent coating or nonstick coatings.
✓Bare metal or glass, no coating at all
Acoustic360
Ernie Ball Everlast Acoustic Guitar Strings
Phosphor bronze/stainless steel wound on steel core
Lower PFAS concern, acoustic guitar strings use standard metal materials with no known fluorochemical treatments.
✓Bare metal or glass, no coating at all
Dean Markley
Electric Guitar Strings
Steel alloy strings (nickel-plated or stainless steel core)
Lower PFAS concern, steel strings lack typical PFAS applications, but no brand disclosure exists.
✓Bare metal or glass, no coating at all
More guitar strings grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.