Before you choose
- Typical TDS values need test conditions.
- Match the SDS to the exact supplied product and form.
- Agree on which batch tests and documents are delivered.
A TDS helps you compare a grade
A Technical Data Sheet may give typical properties, preparation conditions and processing recommendations. Read the specimen type, print direction, conditioning and post-treatment alongside the number. Typical data become an order acceptance requirement only when the parties agree on the limit and method.
An SDS describes hazards and handling
Match the product name, formulation or grade, supplied form, revision and relevant language. Powder, filament and liquid resin made from related chemistry can present different handling considerations. Use the exact SDS and equipment instructions for storage, exposure controls and transport assessment.
Batch evidence answers a different question
A Certificate of Analysis reports the tests and results stated for a specific batch. A Certificate of Conformance may declare compliance with a specification without listing all measured results. The document title alone does not tell you the full testing scope.
| Document | Main purpose | What to confirm |
|---|---|---|
| TDS | Grade properties and processing | Method, specimen state, typical versus guaranteed values |
| SDS | Product hazards and handling | Exact identity, supplied form and revision |
| COA | Stated batch test results | Lot, tests, measured values and acceptance limits |
| CoC | Stated conformity | Specification, declaration scope and issuing party |
Make a short document check before ordering
Cross-check the quote, label and documents for the same designation and formulation. Request missing revisions or lot information before approving a production order. A certificate for one color, thickness or process cannot automatically qualify every variation.
- State required documents in the RFQ and purchase order.
- Ask which characteristics are tested per lot and which are reference values.
- For a formal certification claim, check its exact product and use scope.
Follow a document through one order
Imagine a quotation that names one grade while its attachment covers a broad material family. Treat the attachment as background information until the supplier confirms its applicability. If a revised grade or color is proposed, request the matching identity and scope instead of copying a prior value into the order.
At receipt, connect the actual label and lot to the agreed specification and any supplied report. If the report omits a requested result, ask whether it is untested, reported elsewhere or outside the supplied document scope. A missing result should remain an open item until it is resolved.
| Record | Identity to cross-check |
|---|---|
| Quotation / purchase order | Grade, supplied form, color and specification revision. |
| Container / spool label | Delivered designation, net quantity and lot. |
| Batch document | The lot and explicitly included tests or declaration. |
| Trial / approval record | Material identity, process version and acceptance result. |
Questions buyers ask
Will every shipment include a COA?
Document availability and test scope vary by supplier and product. Specify what is required and obtain written confirmation in the quotation.
Can the catalog image prove the batch is compliant?
Photography can identify a material or illustrate an application. Batch acceptance depends on the agreed specification and evidence.
Sources
- Spectrum — supplier FAQ
Testing a product and supplying a particular test report are different commitments.
- Carpenter Additive — PowderRange brochure
Powder properties and conformity documentation; historical brochure, not a current availability or COA promise.
- RESIONE — manufacturer material documents
Product-specific safety information; match the exact supplied formulation.