This standard specifies the classification, technical requirements, test methods, inspection rules, and general requirements for product marking, storage and transportation of talc products. This standard applies to the quality inspection and acceptance of talc mineral products. This standard does not apply to talc block products, such as talc pens, talc slabs, talc bricks, talc sculptures and other standard materials. GB 15341-1994 Talc GB15341-1994 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Tale [umps
7 Subject Content and Scope of Application
GE 15341—94
This standard specifies the classification, technical requirements, test methods, inspection rules and general requirements for product marking, storage and transportation of talc products. This standard applies to the quality inspection and acceptance of talc ore products. This standard does not apply to talc block products, such as talc pencils, talc slabs, clear stone bricks, talc carvings and other standard materials. 2 Reference standards
GB1.3 Guidelines for standardization work Product standard compilation regulations GB5950 General rules for whiteness test methods for building materials and non-metallic mineral products GB2007.7 General rules for sampling and sample preparation of bulk mineral products Particle size determination method GB/T15343 Chemical analysis method of talc
GB/T15344 Physical inspection method of talc
3 Terms and codes
3.1 Terms
3.1.1 Cosmetic lump talc
Lump talc used for processing and producing cosmetic grade and pharmaceutical-food grade talc. 3.2 Codes
HK: Cosmetic lump talc.
DK: Large lump talc.
ZK, medium lump talc.
AL: Small talc.
4 Product classification
4.1 Classification and grading
According to industrial use, talc is divided into two categories: cosmetic block talc and industrial talc. Various types of talc are divided into superior products, first-class products and qualified products according to their physical and chemical performance indicators: small-grain talc is divided into three quality grades: No. 1, No. 2 and No. 3. 4.2 Specifications and sizes
Industrial talc is divided into the following three specifications according to any maximum dimension of its natural block length, width and thickness: large block talc: the maximum side size should be greater than 200mm; medium block talc: the maximum side size is 20-200mm; small-grain talc: the maximum particle size is less than 20mm. 4.3 Product Marking
Approved by the State Administration of Technical Supervision on December 22, 1994 and implemented on August 1, 1995
Talc product marking is expressed in the following way: 4.3. 1
XXX-XXX
-Standard No.bzxZ.net
-Specification and Size
GB 15341—94
Product name and code
2Marking examples
Example 1: Cosmetic talc block with a block size of 200mm and a whiteness of 90% Talc HK90-200GE
Example 2: Small talc with a particle size of less than 20mm and a whiteness of 75% Talc AL75-20GB
5Technical requirements
5.1Appearance quality
5.1.1 Talc should be soft and smooth, with uniform color. 5.1-2 Talc should be tasteless and odorless, with no foreign impurities mixed in. 5.2Physical and chemical performance requirements
5.2.1 Cosmetic talc block
The physical and chemical properties of cosmetic talc block should comply with the requirements of Table 1. Table 1
Physical and chemical properties
Silicon dioxide
Magnesium chloride
Ferric oxide
Aluminum chloride
Calcium oxide
Loss on ignition (1000)
Acid soluble matter
Water soluble matter
Blocks for cosmetics
Blocks for medicine and food
Amphibole asbestos minerals
5.2.2 Industrial talc
The physical and chemical properties of industrial talc shall comply with the requirements of Table 2. Superior products
No immediate blue color
3×10-4
10×10-
X-ray diffraction analysis, no detection
Qualified products
Silicon dioxide
Magnesium oxide
Physical and chemical properties
Ferric oxide
Aluminum hydroxide
Calcium oxide
Loss on ignition (1 000)
6 Test methods
6.1 Appearance quality
Based on sensory inspection.
6-2 Whiteness
According to GB5950,
6.3 Blockiness (particle size)
According to GB2007.7.
Superior products
GB 15341—94
Large talc, medium talc
First-class products
Qualified products
Small talc
6.4 Silicon dioxide, magnesium oxide, ferric oxide, aluminum oxide, calcium oxide, ignition loss, acid soluble matter, water soluble matter, iron salt, arsenic, lead, etc. shall be tested in accordance with GB/T 15343. When several test methods are listed in parallel, method A shall be used as the arbitration method. 6.5 Amphibole asbestos minerals
Perform in accordance with GB/T15344.
7 Inspection rules
7.1 Inspection classification
7.1.1 Talc inspection is divided into factory inspection and type inspection. See Table 3 for various inspection items. Table 3
Product name
Cosmetic block
Industrial talc
Factory inspection items
Appearance quality
Whiteness, silicon dioxide, magnesium oxide, ignition loss, water-soluble matterAppearance quality
Whiteness, silicon dioxide, magnesium oxide, block size (particle size)Type inspection items
Appearance quality
All items listed in Table 1
Appearance quality
All items listed in Table 2
7.1.2 Type inspection shall be carried out in any of the cases in GB1.36.6.1. In the normal production process, type inspection shall be carried out every six months.
7.2 Batch grouping rules
7.2.1 Batch composition principle
2: Talc of the same color, same variety, same specification and same grade produced in the same origin can be grouped into batches b. Talc produced in different periods or intermittently shall not be grouped into batches. 7.2.2 Batch
The size of the clean stone batch shall be determined according to the production capacity and actual sales situation. GH15341-94
Generally, 500t is a basic batch of bulk talc. When it is larger than 500t, it shall be divided into several batches. If it is less than 500t, it shall also be counted as one batch.
7.3 Sampling and sample preparation
7.3-1 Sampling
7.3.1.1 On the natural ore pile in the form of hand-selected stacking or screening unloading, the grid method is used for equidistant sampling. The size of the grid is 0.5m×0.5m. From each intersection of the grid line, from the surface to the inside and down to 0.3m, continuously take sub-samples of about 1kg (knock out fragments or shovel out broken particles and powder residue). Combine all sub-samples to form the sample of the batch. 7.3-1.2 For a basic batch, at least 40 sub-samples shall be taken, and the total amount of samples shall not be less than 40kg; for less than 500t, the number of sub-samples taken shall not be less than 20 sub-samples, and the total amount of samples shall not be less than 20kg. 7.3.2 Sample preparation
7.3.2.1 Pass the talc sample through a crusher until all particles are crushed to -10mm. After mixing and reduction, retain a sample of 20kg. 7.3.2.2 Pass the sample through a crusher again until all particles are crushed to -1mm. After mixing and reduction, retain a sample of about 4kg. 7.3.2.3 Pass the reduced sample (about 4kg) through a pulverizer and grind it to -180μm. After sufficient mixing, divide it into two parts. One part is sent for inspection and the other part is kept for reference.
7.4 Judgment rules
7.4.1 When all the inspection indicators of a batch meet the standard requirements, the batch is judged to be qualified. 7.4.2 If any of the inspection indicators does not meet the standard requirements, double sub-samples should be re-drawn and the unqualified items should be re-inspected. If the re-inspected indicators meet the standard requirements, the batch is deemed qualified; if they still do not meet the standard requirements, the batch is deemed unqualified. 7.4.3 After receiving the talc, if the user finds that the product quality does not meet the technical requirements, he must submit a re-inspection report within 45 days and the two parties will negotiate to resolve the issue.
If both parties still have objections, they can entrust the national quality supervision agency to conduct arbitration. 8 Marking, transportation and storage
8.1 Marking
8.1.1 Each batch of talc should be accompanied by a product certificate. The certificate must indicate the following: a. Product mark;
h. Batch number:
Production date:
d. Production site
8.1.2 If packaging is required, the following signs should be painted on the packaging bag: Product name;
Trademark:
Product mark:
d. Batch number
e: Production date;
f. Production factory.
8.2 Transportation
Transport vehicles and cabins should be clean and hygienic, without stagnant water and odor. 8.3 Storage
Talc products can be stored in stock or in the open air. Different varieties, specifications and grades of talc should be stacked separately. The purchase and storage period is 6 months.
Additional instructions:
This standard is proposed by the State Bureau of Building Materials Industry. GB15341--94
This standard was drafted by the Non-metal Research Institute of Wuhan University of Technology. The main drafters of this standard are Jiang Deyu, Peng Ping and Yan Cuihua. From the date of implementation of this standard, the original national building materials partial standard JC160-82 Industrial Raw Material Talc" will be invalid
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