ASTM D(). Standard Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Gage. standard by. ASTM D(细度) – Designation: D – 05 (Reapproved ) Standard Test Method for Fin. ASTM D Fineness of Dispersion of Pigment-Vehicle. Systems. Test Specimen At least grams of uniformly mixed solder paste. Equipment/.
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Determine the point in the particle distribution that approximates a similar end point pattern to that of the pictorial standards. Rocking the scraper forward or back will reveal poor contact due to wear or warpage.
Do not consider any reading for the reported neness when the time lapse exceeds 10 s. Use a solvent and a soft cloth. Average the two readings to the nearest 14 Hegman units 5 m. The interlaboratory test astk from the previous revision of this method are valid, but because of the discrete nature of the data, a new analysis of the values needs to be done. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. This standard has been approved for use by agencies of the Department of Defense.
When using the two-path gage, average the values in the two paths to the nearest 14 Hegman unit. NOTE 2—Wear or warpage of the scraper may be noted by facing the edge of the scraper down on the smooth level face of the gage, then inspecting the contact edge by means of a strong light, placed behind the gage.
Current edition approved Feb. Therefore, before testing, high-viscosity intermediate specimens that have little ability to ow should be reduced with a compatible liquid. At some point in this path, particles or agglomerates, or both, will become visible. The path shall be tapered uniformly in depth lengthwise from about 4 mils m at 10 mm from one end to zero depth at the other with intermediate calibrations in accordance with the depth at those points.
Signicance and Use 4. Last previous edition approved in as D — There are 2 delimited sections on this gage, each of 6. Reduction should be in approximately the same proportion as the intermediate will be reduced in practice.
A number in parentheses indicates the year of last reapproval. This process allows the two test readings to be made with limited time lapses between completion of drawdown and reading.
Report micrometer readings to the nearest multiple of 5 m and Hegman readings to the nearest 14 unit, Keeping the gage between the operator and the light source, make the angle between the face of the gage A count is made of the particles deposited in the two delimited areas, and cleanliness texture reading is determined. Keeping the gage between the operator and the light source, make the angle between the face of the gage and the line of vision so that the image of the uorescent tube appears in the material on the gage.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. The arrow in each drawing represents the end point reading for that distribution. Precision and Bias The values given in parentheses are for information only.
When using the double-path gage, place material in both paths.
Replace or recondition unsatisfactory blades. Summary of Test Method 3. Users atm this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
It is preferable to scan from the shallow end toward the deep end, since this allows the operator to just decide when the dense pattern breaks, rather than trying to decide whether Copyright by ASTM Int’l all rights reserved ; Sun Jul 4 This average is considered one reading. Exert upon the scraper only sufficient pressure to clean excess material from the face of the gage. At this stage, it is necessary to be able to judge if the pigment agglomerates have been sufficiently broken up so d12210 not to interfere with the smoothness of the nished coating lm.
D — 05 1-in. These patterns are to be used for notation of frequency of particles d12100 should not be interpreted according to the size of the dots.
Standard ASTM D1210
Preferred calibrations are Hegman units and micrometers Note 1. A superscript epsilon indicates an editorial change since the last revision or reapproval. Within 10 s of asmt the specimen on the gage, make a reading as follows: Originally approved in Keep the gage covered or encased at 2 5.
NOTE 6—Clear nishes may have to be viewed at a lower angle or they may have to be opacied with a nely ground colorant or dye in order to see the particles better. Three ratings are indicated: This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
D — 05 Reapproved Standard Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Gage1 This ashm is issued under the xed designation D; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.