NB/SH/T 0408-2013 Determination of surface wax on waxed paper or paperboard

AI-translated method card — human verification pending. This is not an official translation of the standard. Unclear source values remain unverified; check the original standard and product certificate before use.

Card type: Test method

1. Method number / full title / English title / replacement relationship

• Standard number: NB/SH/T 0408—2013
• Chinese full title: Determination of surface wax on waxed paper or paperboard
• English title: Standard test method for surface wax on waxed paper or paperboard
• Replacement relationship: replaces SH/T 0408—1992 "Determination of surface wax on waxed paper or paperboard"
• Adoption relationship: modified adoption by redrafting method of ASTM D 2423—90 (2007) "Determination of surface wax on waxed paper or paperboard" (English version)
• Main differences from SH/T 0408—1992 (original text):
  • Added clauses "Normative references", "Terms and definitions", "Significance and use", "Bias", "Keywords"
  • "Analytical balance, sensitivity 0.0002g" changed to "Electronic balance, scale interval 0.001g" (see 4.2, 1992 edition 4.1)
  • "Single-sided or double-sided blade" changed to "single-sided blade" (see 4.3, 1992 edition 4.2)
• Main differences from ASTM D 2423—90 (2007) (original text):
  • Units of measurement adopt the units commonly used for paper in our country
  • Deleted some content involving unit conversion
  • "Weigh each waxed paper specimen on an analytical balance, accurate to 0.5% of the total weight" changed to "Weigh each specimen on an electronic balance, read to 0.001g"
• Drafting information: proposed by China Petrochemical Corporation; under the jurisdiction of the Petroleum Wax Products Subcommittee of the National Technical Committee for Standardization of Petroleum Products and Lubricants (SAC/TC280/SC3); drafting organization is Fushun Research Institute of Petroleum and Petrochemicals, Sinopec Corp.; main drafter Luo Yadong
• First issued: 1989; first revision in 1992 year 5 month; this is the second revision
• Publication/implementation: published on 2013-06-08, implemented on 2013-10-01; issued by the National Energy Administration

2. Scope of application and non-applicability

• Scope (Chapter 1): This standard specifies the method for determination of surface wax on waxed paper or paperboard.
• Non-applicability: no explicit "non-applicability" clause is provided in the available source.
• Significance and use (Chapter 3): Many properties of waxed paper or paperboard are related to the amount of surface wax. Determination of wax amount by solvent oil extraction cannot distinguish the wax remaining on the surface of the substrate from the wax penetrating into the substrate. The amount of wax on the surface of each substrate can be determined by a physical dewaxing method.

3. Method principle

• Method summary (Chapter 2): Scrape off the surface wax from waxed paper or paperboard with a blade, and calculate the surface wax amount of the waxed paper or paperboard from the mass difference of the paper before and after scraping.

4. Reagents and materials (purity / preparation)

• Paper pad (4.1): placed under the waxed paper during the wax scraping operation, used as a backing.
• Reagents: not provided in the available source.
• Purity / preparation: not provided in the available source.

5. Apparatus and equipment

• 4.1 Paper pad: placed under the waxed paper during the wax scraping operation, used as a backing.
• 4.2 Electronic balance: scale interval 0.001g.
• 4.3 Single-sided blade: used for scraping wax on waxed paper (original text "used for scraping wax on dragonfly paper", requires confirmation against the source standard (source-text extraction)).
• 4.4 Paper cutter or other apparatus: equipped with a fixture or template to ensure that the two sides of the cut paper are parallel to each other; a die-cutting machine may also be used.
• 4.5 Measuring instrument: can measure sample dimensions accurate to 0.5mm.

6. Recommended operating conditions

• Not provided in the available source (the standard does not list recommended operating conditions such as temperature, humidity, time, etc.).

7. Sampling and specimen preparation

• Sampling (Chapter 5): select waxed paper or paperboard free from wrinkles, cracks or other damage as the specimen.
• Specimen preparation (6.1): take some 100mm × 100mm specimens, determine the area of each specimen (mm²), accurate to 1.0% of its total area.
  • Note: the area unit source-text extraction in the original text is "mm'", which according to the context should be mm², requires confirmation against the source standard (source-text extraction).

8. Analytical procedure

• 6.2 Weigh each specimen on an electronic balance, read to 0.001g.
• 6.3 According to the following method, scrape off the surface wax from one side of the specimen (the first side) with a scraper. Press the specimen firmly onto the backing paper to avoid slipping, keep the blade perpendicular to the specimen, and repeatedly scrape lightly in one direction over the entire area of the first side of the specimen, rotate the specimen 90°, and continue scraping wax in the same way, repeating this operation until the specimen has been scraped from four directions at least twice each.
• 6.4 According to clause 6.2, reweigh the specimen and record its mass as the reference mass of the specimen after scraping wax from the first side.
• 6.5 According to clause 6.3, perform the wax scraping operation on the second side of the specimen.
• 6.6 Weigh the specimen again and record its mass as the reference mass of the specimen after scraping wax from the second side.

9. Qualitative and quantitative determination and calculation formula

• 7.1 The surface wax amount on each side is obtained from the mass difference of the specimen. The mass difference before and after scraping wax from the first side is the surface wax amount on the first side of the specimen; the mass difference before and after scraping wax from the second side is the wax amount on the second side of the specimen; convert g/mm² × 10⁶ to express in g/m².
  • Note: this paragraph source-text extraction in the original text is severely incomplete ("from the specimen mass difference obtain the surface ... 10° convert to g/m' expression"); the above is a restoration based on the context and the common wording of ASTM D2423, and the specific wording requires confirmation against the source standard (source-text extraction).
• 7.2 Report the surface wax amount on the first side and second side of the specimen respectively in g/m². Take the arithmetic mean of the results of repeated determinations as the surface wax amount of the waxed paper or paperboard, retaining three significant figures.

10. Precision

• 8.1 Judge the reliability of the results according to the following provisions (95% confidence level):
  • 8.1.1 Under the same test conditions, using the same test material, the same test instrument, and under normal operating conditions, the difference between two determination results shall not exceed 0.976 g/m².
  • 8.1.2 (original number source-text extraction incomplete, requires confirmation against the source standard (source-text extraction)) In different laboratories, using the same test material, under normal operating conditions, the difference between two test results shall not exceed (value source-text extraction missing, requires confirmation against the source standard (source-text extraction)) g/m².
• Source of precision values (original text): obtained by using commercial paper with a wax coating amount per side of 3.25 g/m²～9.76 g/m² as test samples, and determining five identical specimens in each laboratory.
  • Note: in the original text "3.25 p/m-9.76 g/m", the former unit source-text extraction is suspected to be g/m², requires confirmation against the source standard (source-text extraction).
• Bias (Chapter 8): original text "this method indeed ... has no bias" (source-text extraction incomplete), the bias statement requires confirmation against the source standard (source-text extraction).

11. Report

• 7.1 The surface wax amount on each side is obtained from the mass difference of the specimen; the mass difference before and after scraping wax from the first side is the surface wax amount on the first side of the specimen; the mass difference before and after scraping wax from the second side is the wax amount on the second side of the specimen; convert g/mm² × 10⁶ to express in g/m².
• 7.2 Report the surface wax amount on the first side and second side of the specimen respectively in g/m². Take the arithmetic mean of the results of repeated determinations as the surface wax amount of the waxed paper or paperboard, retaining three significant figures.

12. Referenced documents

• The foreword mentions drafting according to the rules given in GB/T 1.1—2009.
• Main text "Normative references" clause: no specific list of referenced documents is provided in the available source (the foreword states that this clause has been added, but it is not seen in the extracted main text).

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick reference Q&A