GB/T 20214-2026Crystalline layered sodium disilicate (English PDF)

6.1 Inspection Classification

6.1.1 Type Testing Type testing includes all items specified in Chapter

4.Type testing shall be conducted in the following circumstances.

a) During formal production, significant changes may occur in raw materials, processes, equipment, and management (including changes in personnel qualifications), which could affect the product. When it comes to quality;

b) During normal production, type testing should be conducted periodically, generally once a month;

c) When production resumes after a long period of shutdown;

d) When the factory inspection results differ significantly from the previous type inspection results;

e) When the quality supervision agency requests a type test.

6.1.2 Factory Inspection The factory inspection items include whiteness, pH, calcium exchange capacity, and magnesium exchange capacity.

6.2 Product Batching and Sampling Rules

6.2.1 Product delivery in batches and sampling acceptance Products of the same specification and batch number delivered in one transaction constitute one delivery batch. Products delivered by the manufacturing unit shall first be inspected by its quality inspection department in accordance with this document, and shall be certified as conforming to this document and issued a product quality inspection certificate. A certificate is required before a product can leave the factory. The product quality inspection certificate should include the manufacturer's name, product name, trademark, applicable standard number, and batch number. And/or production date, quality indicators, etc. The receiving party shall inspect the goods upon presentation of the product quality inspection certificate. If necessary, sampling inspection may be conducted within one month in accordance with the following provisions.

6.2.2 Sampling The sample size required for acceptance by the receiving party should be determined according to Table 2 based on the batch size. Both parties should meet at the delivery location to collect the sample from the delivered batch. Randomly select bags of samples from the middle.

6.3 Judgment Rules The test results are determined as qualified or unqualified using the rounded value comparison method. If any physicochemical indicator fails to meet the standard, twice the number of bags of samples should be taken again. If the non-conforming items are re-inspected and the re-inspection results are still non-conforming, then the batch of products is deemed non-conforming.

7.1 Marking

7.1.1 The packaging shall bear the following markings.

a) Product name, trademark, and applicable standard number;

b) Batch number and/or production date;

d) It has markings or labels indicating that it is waterproof or moisture-proof;

e) The name, address, and contact number of the manufacturing company.

7.1.2 The printed markings (patterns and text) on the packaging should be clear and free from fading.

7.2 Packaging Packaging should be done in woven bags lined with plastic film, and the net content of the package should conform to the nominal weight.

7.3 Transportation During transportation, it should be protected from sunlight, rain, and moisture. Handle with care to avoid damage to the packaging bags.

7.4 Storage Products should be stored in a dry, clean warehouse. If outdoor storage is necessary, appropriate moisture-proof measures should be taken, and the stack height should not exceed the support height. The maximum load on the goods shall be limited, and they shall be covered to protect them from sun, rain, moisture, and damage.

7.5 Shelf life Under the above storage and transportation conditions and without being opened, the product has a shelf life of at least one year from the date of production.