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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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.
To be sure of an accurate grind reading, specimens must be free of air bubbles. It may also be used to assess the inclusion of particulates by a cleanliness or texture rating.
Standard ASTM D1210
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The two protocols for reading the neness are: Therefore, before testing, high-viscosity intermediate specimens that have little ability to ow should be reduced with a compatible liquid.
The path will be cut to two different depths, each for half of its length. These patterns are to be used for notation of frequency of particles and should not be interpreted according to the size of the dots.
NOTE 7—It is suggested that each side be counted only to a maximum of No further reproductions authorized. Current edition approved Feb.
Asgm test method describes a way of making this judgment. Three ratings are indicated: Average the two readings to the nearest 14 Hegman units 5 m. In order that readings obtained with these arbitrary scales and modications can be reported in the preferred units, the approximate relationship of these d2110 to c1210 depth is shown in the following example: A superscript epsilon indicates an editorial change since the last revision or reapproval.
Be sure the gage surface is free of lint. 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. NOTE 1—Several arbitrary scales and modications of the gage are used by industry. Signicance and Use 4. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and wstm not revised, either reapproved or withdrawn.
When using the two-path gage, average the values in the two paths to the nearest 14 Hegman unit.
ASTM D Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Scale
NOTE 3—For this test method to function properly, the pigment particles in the specimens to be tested should be free to settle to the bottom of the axtm channel after the drawdown. 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 d12100 with the depth at those points.
Summary of Test Method 3.
Preferred calibrations are Hegman units and micrometers R1210 1. Users of 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. This average is considered one reading. Precision and Bias This standard has been approved for use by agencies of the Department of Defense. Last previous edition approved in as D — A viewing box is not mandatory for illumination, but if one is desired, a proposed design for a viewing box is contained in Appendix X1.
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.
A count is made of the particles deposited in the two delimited areas, and cleanliness texture reading is determined. Reduction should be in approximately the same proportion as the intermediate will be reduced in practice. At some point in this path, particles or agglomerates, or both, will become visible. Originally approved in Avoid qstm or scratching with other metal.