Quality, Testing & Materials
Browse laboratory reports and production records to understand what was checked, which samples were tested and what each document supports.
Reports identify their own models, components and test conditions. A tested model is not an automatic match to every color, batch or SKU. Supplier declarations and process checks are listed separately from independent laboratory results.
P1199-347 and F272 reports identify Miduoduo as manufacturer. A583 reports identify Miduoduo as the company shown on the report. Open the complete PDF for component tables, methods and laboratory conclusions.
Tested model / components
Lead, cadmium and nickel release: PASS for the tested bracelet / necklace components listed in the report. Miduoduo is identified as manufacturer. Batch and SKC/SPU are not provided.
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Tested model / components
Lead, cadmium and nickel release: PASS for the listed gold-tone and steel-tone earring pins and bodies. Miduoduo is identified as manufacturer. Results apply to those tested components.
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Tested sample
The submitted gold-color A583 sample passed the stated lead, cadmium, mercury and hexavalent-chromium tests. This report does not establish steel grade or a whole-catalog RoHS claim.
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PASS under the report's EN 12472:2020 wear/corrosion simulation and EN 1811:2023 nickel-release assessment. Applies to the tested coated sample; does not establish steel grade, hypoallergenic suitability for every wearer or coating life.
View / Download PDF (opens in a new tab)Product material specifications, supplier declarations and chemical-composition testing answer different questions. Restricted-substance or nickel-release PASS results do not establish a stainless-steel grade. Material-control records below retain the laboratory's actual conclusion.
View the material-selection & testing-support collection →Material-control / corrective evidence
The tested sample did NOT meet the cited ASTM A276/A276M-2025 316 chemical-composition requirements. Keep this as a material-control record; it must not be used as proof of 316 / 316L or reclassified as a 304 laboratory verification.
View / Download PDF (opens in a new tab)Measurements describe the recorded samples and measurement points. Thickness can vary with geometry, hanging or coating angle, inner or outer surface and production scope. Finish-color names describe appearance; input gold material is separate from the composition of a finished coating.
Supplier process measurement
Three readings on the submitted earring sample: reported Au mean 0.036 μm and second-layer mean 0.481 μm. The programme is Au/TiN/SUS; the second table column is labelled Ti 2. This is a supplier measurement record, not an independent gold-composition assay or a minimum thickness for all jewelry.
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Factory / process record
Reported sample means: Au 0.036 μm; TiN 0.529 μm; three readings. Applies to the measured sample and locations, with no exact SKU or production-batch mapping supplied.
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Factory / process record
Reported sample means: Au 0.033 μm; TiN 0.297 μm; three readings. Actual thickness varies with geometry, coating angle, surface and measurement point; these are sample averages.
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Upstream supplier statement
A supplied upstream statement about gold material used in a factory process. Its date and named parties must be considered when matching a project. Input-material purity does not establish finished coating gold content, an 18K gold composition, or current use on every Miduoduo SKU.
View supplied statement (opens in a new tab)Factory durability checks help document how pictured samples performed under recorded conditions. They are separate from laboratory chemical testing and do not predict a fixed service life.
Factory / process record
The supplied pages record a 48-hour salt spray test and an OK assessment for the pictured samples. SKU and batch mapping are not provided. These factory records do not establish universal waterproof performance or a guaranteed wear life. No separate vibration-test result is identified in the supplied pages.
View / Download PDF (opens in a new tab)Original supplied version (opens in a new tab)External manufacturer reference
The report records lead, cadmium and nickel-release PASS for its listed sample/components. Applicant and manufacturer are Dongguan Chang'an Dreamy Jewelry Factory. Miduoduo is not identified as manufacturer; it is not evidence of testing for Miduoduo's entire catalog.
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