Nursing Pad Diameter, Thickness and Absorbency Testing

Separate size, thickness and capacity

Reusable nursing pads, also called breast pads, are worn inside a bra to manage breast-milk leakage. This guide concerns breast pads, not menstrual pads. Buyers often group diameter, thickness and absorbency under “size,” but these are separate specification questions. Diameter describes the pad’s span. Thickness describes its profile under a defined measuring condition. Absorption relates to a chosen test outcome. A number for one does not define the others.

The current confirmed starting diameter is 12 cm. This is the available product size reference, not a stated tolerance band. A production specification should explain where and how diameter is checked, what counts as the edge for an irregular or stitched perimeter, whether the pad is measured relaxed or under a fixture, and what acceptable variation the parties agree. Do not invent a plus/minus tolerance. Confirm it in writing before sampling or bulk production.

Thickness has not been supplied. It can vary with how a soft textile article is placed, compressed, conditioned or measured. If thickness matters for bra fit, pack volume, display or comparison with another style, agree a measurement method first. State whether the sample is flat and uncompressed, what instrument or fixture is used, where the reading is taken, how many readings are recorded and what acceptance range applies. Do not treat a photograph or hand feel as a numeric thickness specification.

Absorption target is another distinct term. A target of 15 mL is currently stated, but no test method, conditioning, dosing, observation or pass criteria are provided. Therefore it must not be described as certified capacity or as a demonstrated result. The buyer and supplier need to define what the target means before a result can be compared across samples, production lots or suppliers.

Document the construction tied to the measurement

The current product starting point has three layers, including a 100% cotton flannel layer and a PUL layer. It is not a 100% cotton product. The exact third-layer material and GSM for every layer are open and require written confirmation. Thickness and absorbency may depend on the construction; testing an unidentified pad cannot resolve how a later specified version will perform.

Before testing, identify the exact sample revision and the proposed layer map from breast-facing side to bra-facing side. Record the flannel and PUL position, third layer once confirmed, material and GSM for all layers once confirmed, sewing and edge treatment, and any finishes that the supplier confirms. If any of these change, assess whether new measurement or performance checks are needed. Do not assume results transfer automatically to a changed construction.

Link the sample label, written specification, test record and quotation with one revision identifier. This keeps buyer feedback and supplier changes traceable. The flannel and PUL buyer guide discusses how those materials serve different roles in the layer stack.

Agree a reproducible 15 mL test

First clarify the question the test is intended to answer. “Absorbs 15 mL” could be interpreted as fluid delivered to the sample, fluid retained after a defined interval, or no visible transfer under a specified check. Those are not automatically equivalent. Decide whether the buyer needs a comparative screening result, an internal acceptance check or evidence to support a public product statement. A test plan should match the intended decision.

At minimum, document sample identity and quantity, conditioning before test, ambient conditions if relevant, fluid identity and temperature, sample orientation, delivery location, dosing volume and rate, whether the fluid is delivered at once or in increments, interval between doses, rest time, observation period and measurement approach. If using pre- and post-test mass, agree the balance resolution, weighing timing and handling procedure. If checking transfer or visible leakage, define the contact material, pressure or load if any, duration, observation points and what constitutes a failure.

Set repetition count and acceptance rule in advance. For example, the written plan can state the number of samples, whether every specimen or an average must meet a criterion, and how to record anomalous results. This article does not prescribe universal values for those settings. They should reflect the buyer’s product need and the supplier’s agreed capability. Record deviations rather than silently adjusting the procedure mid-test.

Use consistent tools and operators where practical. Mark the test area, keep a dose log, capture observations and retain representative samples when useful. A photograph can supplement a written record but cannot replace key procedural details. Identify who conducted the test and when. If a third-party report is needed, agree the laboratory, specimen description and test scope. A test image showing water on a fabric is not evidence of the finished nursing pad meeting the 15 mL target.

Keep the result in proportion to the evidence

After a run, report the outcome with the method and limitations: exact sample version, conditioning, dosing, observation, pass criteria, number of specimens and results. Do not publish a bare number without explaining what it measures. A supplier’s target, a single informal trial, a lab method and a certified claim are different things. This page establishes only a target and the need for a jointly agreed test, not a result.

If the test focuses on absorption, do not call it a leakproof test unless the method actually evaluates leakage under defined use conditions. Conversely, a surface or transfer check does not necessarily measure retained fluid. Keep separate performance statements separate. If a certificate or report is offered, inspect the exact product, material and batch scope at Certifications; a document for raw fabric alone may not cover the finished pad. This is sourcing guidance and does not provide a legal or compliance guarantee.

From sample to bulk order

The current retail pack contains four pads. The stated carton measures 53 × 38 × 48 cm and contains 400 packs. A sample is US$30 with an approximate three-day lead time. Bulk production is approximately 25 days after final specification and order confirmation. Treat these as current starting details and request confirmation in the written quotation for the precise version, quantity, packaging and delivery arrangement.

For sample approval, include the 12 cm target diameter, written dimensional tolerance and method once agreed, thickness requirement or “not specified,” the complete layer map and open GSM values, 15 mL target, and the agreed test protocol. Attach an approval record with date and sample revision. If the sample does not meet an agreed requirement, record the observation and resolution before signing off; do not convert an unresolved target into a claim. See the sample approval guide for version control practices.

Make packaging a separate check: verify four pads per retail pack, final artwork and any insert or label requirements. Confirm carton count and dimensions against the final quotation. These logistics facts do not confirm product performance and should not be used to imply a specific durability or test result.

Buyer checklist for a clear RFQ

• Specify nursing pads / breast pads and 12 cm starting diameter.
• Agree how diameter is measured and the allowable tolerance.
• State thickness as open unless a method and range are agreed.
• Confirm the full three-layer map, third layer and all layer GSM values.
• Use 15 mL as a target pending a jointly approved test method.
• Define conditioning, fluid, dose, timing, observation and pass criteria.
• Identify the sample revision and link evidence to the exact construction.
• Confirm pack count, carton details and timing in the written quotation.

Send the measurement and test questions through the reusable nursing-pad RFQ form. Review the product page and resource library as sourcing references, then verify the terms for your selected order in writing.

Frequently asked questions