Relevant device manufacturer certifications vs non relevant resin certifications

Key message: in regulated applications, the only certifications that protect you legally are those that apply to your company, your manufacturing system, and your finished medical devices. Relying on “certifications” or claims from raw material suppliers does not transfer liability away from the device manufacturer.

Trying to “cut corners” by using non-relevant “certifications” of raw material suppliers, instead of certifying your company, your own medical devices, and your own manufacturing processes, will not cover you legally. As the manufacturer, you remain responsible for the quality and safety of the products manufactured in your facility. No third party can cover you against malpractice or replace your responsibility as a manufacturer.

Consequently, reliance on non-valid or non-relevant certifications does not provide legal coverage or warranty, because the safety and quality of any 3D printed device legally relies on the device manufacturer, not on its raw material / 3D resin suppliers.

What is “relevant” certification

Relevant: device-level and process-level compliance

Relevant certifications and compliance evidence are those that apply to the entity that manufactures the finished device and to the manufacturing process used to make it, including:

• Quality management and manufacturing controls implemented by the device manufacturer (process control, traceability, change control, documentation, training).
• Device-level validation demonstrating that your full workflow consistently produces safe and compliant parts for the intended use.
• Process validation covering printer, parameters, cleaning, post-curing, post-processing, inspection and release criteria.

What is “non-relevant” certification

Non-relevant: material-only claims used as a substitute for device qualification

Material or supplier-related documents can be useful inputs, but they are not a substitute for finished device certification/validation. Examples of commonly misused, non-relevant “certifications” include:

• Supplier certificates that do not cover your device design, your printer, your parameters and your post-processing conditions.
• Generic “biocompatibility” statements that are not linked to your finished part and your validated manufacturing workflow.
• Marketing claims that suggest that a resin alone makes a printed device “ready for use” without full device-level validation.

Why this matters for photopolymer 3D printing

With photopolymer materials, safety is strongly workflow-dependent. Differences in printer optics, light power, calibration, cleaning chemistry, post-curing energy, time and temperature can change:

• degree of polymer conversion,
• residual monomer content,
• extractables/leachables profile,
• mechanical and surface performance.

Biomedical device manufacturers are responsible for working with well designed and implemented manufacturing practices, processes, protocols and quality controls, which should ensure maximum polymer conversion and minimum content of leachables, extractables, residuals, impurities and byproducts in their produced medical devices.

Practical checklist

• Do not treat resin documents as device certification. Use them as inputs, not as a legal shield.
• Validate your complete workflow (printing + cleaning + post-curing + post-processing) for your specific device and intended use.
• Control variability (light output drift, contamination, ageing, cleaning fluid reuse, post-curing repeatability).
• Document everything (traceability, deviations, corrective actions, change control).

Related 3Dresyns guidance

• About certification of biomedical devices and food/pharma packaging
• Responsibilities of manufacturers of 3D resins for medical uses
• Safety & biocompatibility framework

Need help?

If you need support to define a controlled, repeatable and compliant workflow, contact us by email: info@3dresyns.com.