“Suitable for a surface” involves both the substrate and the finish, plating, seal or polished layer that actually meets the cleaner. A material name is only a screening clue, not a compatibility conclusion.
ISO 2812-1 addresses resistance of coatings to liquids, while ASTM D1308 evaluates household chemicals on organic finishes. Their scopes differ, but both require the object, liquid, exposure and assessment to be defined. Citing a method is not certification.
A minimum record should identify substrate, surface treatment, sample source and condition, cleaner batch and concentration, tool, dose, contact time, temperature, rinsing, drying, observation points and criteria. Record where and when any change occurs.
Natural-stone guidance shows why broad material categories still need subdivision. Stone type, stain, porosity, sealing, polishing and existing damage can change the result.
A test sheet does not replace hazard labels. CPSC requirements are cited only as US-market background; every target market still needs its own regulatory and label review.
EPHYON’s public ODM service connects use scenarios, formula, dosage form, sampling, packaging and scale-up. A surface-cleaning project can add a substrate-finish matrix and lock concentration, exposure, sample, label and formula versions. The service page does not prove a product passed these tests.
Compatibility, cleaning performance, human safety and environmental attributes are separate. No visible damage on one sample does not prove efficacy, low irritation, sustainability or long-term suitability.
Boundary: this is test-design and evidence-management guidance, not certification, a material warranty or legal advice. Claims should trace to a specific version and defined conditions.