Martin · Guitar Strings
Martin Authentic 80/20 Bronze Acoustic Guitar Strings
Lower-concern product, bronze acoustic strings have no typical PFAS application or documented use.
Martin Authentic 80/20 Bronze strings are made from copper-tin alloy wound on steel, materials with no known PFAS manufacturing pathway or functional need. The brand makes no PFAS claims and none are publicly documented. Acoustic guitar strings fall outside categories (cookware, textiles, coatings) where PFAS are commonly used.
Shop Martin on Amazon →Material
80/20 bronze (copper/tin alloy) wound on steel core
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 Authentic 80/20 Bronze strings use a copper-tin alloy (80% copper, 20% tin) wound around a steel core. This is a traditional, mechanically stable composition with no known toxic release pathways during normal acoustic playing. Bronze alloys are inert in contact with skin, sweat, and saliva at room temperature and do not degrade or leach problematic metals under typical string tension and humidity.
The brand's record and disclosure
Martin is a legacy American string and instrument manufacturer with no documented product safety recalls or chemical contamination incidents on record for their acoustic strings. The brand does not publicly disclose detailed material certifications or third-party testing for heavy metals or manufacturing process contaminants. No public controversy or regulatory action has targeted Martin strings for hazardous substances in available sources.
How it compares in its category
80/20 bronze acoustic strings are a category standard, widely used and considered a baseline reference for acoustic tone and durability. Alternative coatings (phosphor bronze, polymer-wrapped) add marginal safety complexity without clear benefit for this material class. Martin's offering is compositionally typical; no material advantage or disadvantage versus competitors in the bronze-string segment.
If you buy it
Store strings in a dry environment to minimize corrosion of the steel core and bronze wrap; humidity can accelerate oxidation but does not create chemical hazards. Replace strings when they show visible wear, loss of tone, or structural damage (fraying, breakage). No special handling precautions are needed beyond standard care; wash hands after playing if you have sensitive skin or metal sensitivities. Disposal as general waste is appropriate; no special recycling required.
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.”
Heavy metal leaching (copper, tin, steel)
Bronze and steel alloys are mechanically inert and do not leach metals into skin, sweat, or saliva under normal playing conditions. No documented cases of copper or tin toxicity from acoustic string use.
Corrosion byproducts from oxidation
Prolonged humidity exposure can generate copper oxide and other surface corrosion, which may cause skin discoloration or minor irritation in sensitive individuals but poses no systemic health risk from occasional contact.
Formaldehyde or chemical processing residues
No formaldehyde-based treatments or antimicrobial coatings are typical in 80/20 bronze string manufacture. String winding and annealing use heat, not solvent-based processing known to leave hazardous residues.
Nickel or cobalt content (alloy contamination)
Standard 80/20 bronze does not include nickel or cobalt; however, trace contaminants in ore or manufacturing could theoretically be present but are not documented as a concern for Martin or this product class.
Phthalates or plasticizers in packaging
Strings are packaged in paper and cardboard with no known PVC or plasticized coatings. Packaging poses no inhalation or dermal exposure risk for the end user.
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.