Materials & Safety

What our cookware is made of, how it is tested, and how to get the documentation.

What our cookware is made of

• Ceramic nonstick interior: a sol-gel ceramic coating formulated without PFOA, PTFE, lead or cadmium, applied to heavy-gauge aluminium.
• Enameled cast iron: a porcelain enamel fired onto dense cast iron — no bare-metal food contact, no seasoning required.
• Clad stainless & carbon steel: food-grade 18/10 stainless interiors and pre-seasoned carbon steel; every surface that touches food is a food-contact-grade material.

Independent laboratory testing

Our nonstick coatings, enamel finishes and other food-contact surfaces are tested by accredited third-party laboratories operating under ISO/IEC 17025. Testing covers, at minimum:

• US FDA 21 CFR 175.300 — resinous and polymeric coatings for direct food contact (migration limits, solvent and extractable tests).
• EU Regulation (EC) No 1935/2004 — framework requirement that materials do not transfer constituents to food in quantities that endanger health.
• German LFGB — additional food-contact compliance including sensory (odour and taste) testing.
• Heavy-metal migration — lead and cadmium release tested against method-specific limits, with results below the detection thresholds of the applicable standards.
• Performance ratings — oven-safety and maximum-temperature ratings stated on each product reflect the tested specification of that product line.

Each production run is released against the same specifications; goods that do not meet the release criteria do not ship.

Published test documentation

You do not have to take our word for it — the report summaries themselves are published here, and the full reports are available on request:

• MT-FCS-2026-0114 — Food-contact safety of the ceramic nonstick coating (FDA 21 CFR 175.300, EU 1935/2004, LFGB sensory, PFOA, Pb/Cd release). Tested by SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd., ISO/IEC 17025 accredited. Report date 2026-06-18. Result: PASS on all items. Download the report summary (PDF).
• MT-HMM-2026-0087 — Heavy-metal migration of the enameled cast iron interior (ISO 7086-2, ASTM C738, California Proposition 65 settlement thresholds, thermal-shock durability). Report date 2026-05-22. Result: PASS on all items. Download the report summary (PDF).

How to obtain the full documentation

• Email support@martholm.com with the subject line "Safety documentation" (and the product name, if you want batch-specific papers).
• We reply within 2 business days with PDF copies of the current test summaries and the Declaration of Compliance (DoC) for the relevant product lines.
• Retail and marketplace partners can request the full technical file under the same address.

Safe use

Safety also depends on correct use: medium heat with a little oil for ceramic nonstick, low-to-medium heat and no thermal shock for enamel, and hand washing to keep coatings at their best. Full guidance lives in Shipping & ReturnsMaterials & Safety under "Caring for your cookware".