Savarez · Guitar Strings
Savarez Cristal Corum High Tension Strings
Lower concern, classical guitar strings with no known PFAS applications, but no explicit brand disclosure.
Savarez Cristal Corum strings are nylon monofilament wound on stainless steel, materials not typically associated with PFAS. Guitar strings do not require water-resistance, non-stick, or stain treatments that drive PFAS use in consumer goods.
Shop Savarez on Amazon →Material
Nylon monofilament with stainless steel core
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Uncoated safe material
Bare, uncoated material (cast iron, stainless, carbon steel, or glass) with no surface treatment to contain PFAS.
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
Savarez Cristal Corum strings consist of nylon monofilament treble strings (plain nylon) paired with stainless steel wound bass strings. Nylon is a stable synthetic polymer with no known leaching concerns under normal playing conditions; stainless steel is inert and biocompatible. The high-tension designation refers to string gauge and resulting break strength, not to any chemical additive. This material combination is the industry standard for classical guitars and poses minimal chemical exposure risk during use.
The brand's record and disclosure
Savarez, a French string manufacturer with over 70 years of history, does not publish detailed material safety data sheets or chemical disclosures for guitar strings on consumer-facing channels. No public product recalls, contamination incidents, or safety certifications (ISO, Oeko-Tex, etc.) are on record for this product line. The brand's silence on PFAS and other synthetic additives is typical for the musical instrument accessory category, where regulatory pressure remains minimal. No independent third-party testing results are publicly available.
How it compares in its category
Classical guitar strings are low-volume, low-chemical-exposure products compared to cookware, apparel, or cosmetics. Savarez Cristal Corum occupies the mid-to-premium tier; competitor strings (D'Addario, Ernie Ball, budget nylon) use similar nylon and steel constructions with equivalent transparency and equivalent lack of disclosed additives. No meaningful safety differentiation exists between major brands in this material class. Durability and tone vary; safety profiles do not.
If you buy it
Store strings in a cool, dry environment to prevent nylon degradation and corrosion of steel windings; humidity and heat accelerate wear but do not trigger chemical release. Replace strings every 3-6 months depending on playing frequency, as worn or corroded windings may harbor bacteria or shed metal particles. Wash hands after playing if skin sensitivity to nickel is a concern (stainless steel is ~8-12% nickel by composition). No special disposal precautions are needed beyond normal trash.
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.”
Nickel leaching from stainless steel windings
Stainless steel wound strings contain nickel (typically 8-12%). Acidic hand sweat and prolonged skin contact could theoretically mobilize trace nickel; risk is minimal for most users but elevated for those with diagnosed nickel dermatitis. No product-specific testing data exists.
Nylon degradation and microparticle shedding
Nylon monofilament is chemically stable under normal playing conditions. Degradation occurs from UV exposure and humidity but produces inert polymer fragments, not bioaccumulative or toxic byproducts. No health hazard is established for incidental inhalation or ingestion of shed nylon fibers.
Manufacturing additive residues (stabilizers, plasticizers)
Nylon production may involve additives such as titanium dioxide (colorant) or heat stabilizers. Savarez does not disclose additive use. No leaching or off-gassing is expected during string use. Industry-standard polymers present no known contamination pathway.
Bacterial or fungal colonization on wound bass strings
Stainless steel windings trap moisture and sweat, creating microenvironments for microbial growth if strings are not cleaned or replaced regularly. This is a hygiene concern rather than a chemical one and is mitigated by routine replacement every 3-6 months.
Formaldehyde or flame retardant residues
Neither nylon monofilament nor stainless steel requires formaldehyde-based resins or flame retardant treatments. No chemical basis for these hazards in classical guitar strings.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 75% 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.
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.