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GB/T 1721-2008: Determination of appearance and transparency of varnishes, boiled oils and thinners
Status: Valid GB/T 1721: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 1721-2008 | English | 169 |
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Determination of appearance and transparency of varnishes, boiled oils and thinners
| Valid |
GB/T 1721-2008
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| GB/T 1721-1979 | English | 199 |
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Methods of test for appearance and transparency of varnishes, boiled oils and thinners
| Obsolete |
GB/T 1721-1979
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PDF similar to GB/T 1721-2008
Standard similar to GB/T 1721-2008 GB/T 1727 GB/T 1720 GB/T 1724 GB/T 1728 Basic data | Standard ID | GB/T 1721-2008 (GB/T1721-2008) | | Description (Translated English) | Determination of appearance and transparency of varnishes, boiled oils and thinners | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G50 | | Classification of International Standard | 87.040 | | Word Count Estimation | 7,749 | | Date of Issue | 2008-06-04 | | Date of Implementation | 2008-12-01 | | Older Standard (superseded by this standard) | GB/T 1721-1979 | | Quoted Standard | GB/T 3186; GB/T 6682 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 9, 2008 (No. 122 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the varnish, edible vegetable oil and thinner appearance and transparent method. This standard applies to varnishes, edible vegetable oil, paints and thinner appearance and transparency determination, that the presence of mechanical impurities and rendering turbidity. | GB/T 1721-2008: Determination of appearance and transparency of varnishes, boiled oils and thinners
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of appearance and transparency of varnishes, boiled oils and thinners
ICS 87.040
G50
National Standards of People's Republic of China
Replacing GB/T 1721-1979
Varnish, edible vegetable oil and thinner appearance and
Determination of opacity
Posted 2008-06-04
2008-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 1721-1979 "varnish, edible vegetable oil and thinner appearance and transparency assays."
The previous version of Standard GB/T 1721-1979 main technical differences are as follows.
--- Increasing the normative references;
--- Test ambient temperature changes (23 ± 2) ℃;
Determination of increased transparency --- instrument method.
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee paint pigment.
This standard was drafted. CNOOC Changzhou coating Chemical Research Institute.
The main drafters of this standard. Huang Yidong Chen Feng.
This standard was first published in 1979.
Varnish, edible vegetable oil and thinner appearance and
Determination of opacity
1 Scope
This standard specifies the method for determination of varnish, edible vegetable oil and thinner appearance and transparency.
This standard applies to varnish, edible vegetable oil, paint thinners and determination of appearance and transparency, namely whether it contains mechanical impurities and rendered turbid
degree.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 3186 Paints, varnishes and raw materials for paints and varnishes - Sampling (GB/T 3186-2006, ISO 15528.2000, IDT)
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
3 Sampling
In accordance with the provisions of GB/T 3186 to take a representative sample of the test product.
4 Determination of transparency
4.1 visually
4.1.1 Equipment
4.1.1.1 stoppered cuvette. capacity 25mL.
4.1.1.2 colorimetric frame.
4.1.1.3 straw. 10mL.
4.1.1.4 cylinders. 20mL, 100mL.
4.1.1.5 Balance. accurate to 0.01g.
4.1.1.6 spectrophotometer.
4.1.1.7 Wooden camera obscura. 500mm × 400mm × 600mm. Figure 1.
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