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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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. Current d110 approved Feb. 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.
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 asstm. The values given in parentheses are for information only. 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by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.
NOTE 5—For this d1201 method to function properly, the pigment particles in the specimens to be tested should be free to settle to the bottom of the gage channel after the drawdown. At some point in this path, particles or agglomerates, or both, will become visible.
This standard has been approved for use by agencies of the Department of Defense. This is the neness reading. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
This average is considered one reading. This process allows the two test readings to be made with limited time lapses between completion of drawdown and reading. Rounded to nearest 5 m or 0. 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. Signicance and Use 4. The arrow in each drawing represents the end point reading for that distribution.
ASTM D Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Scale
No further reproductions authorized. Replace or recondition unsatisfactory blades.
Average the two readings to the nearest 14 Hegman units 5 m. Protect gages that lie idle for extended periods of time from rust with an oil coating or oil soaked wrap. 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. Users of this standard are expressly advised that determination of the validity of any asym patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Care of Gage 6. Summary of Test Method 3. 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.
Rocking the d1201 forward or back will reveal poor contact due to wear or warpage.
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. When using the two-path gage, average the values in the two paths to the nearest 14 Hegman unit. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
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 gage channel after the drawdown.
Any light coming through between scraper and gage face shows that the scraper has been damaged and is not satisfactory for use. This test method describes a way of making this judgment. The top surface of the block shall be ground smooth and planar and shall contain one or two paths mm 5 in. Report micrometer readings to the nearest multiple of 5 m and Hegman readings to the nearest 14 unit, NOTE 1—Several arbitrary scales and modications of the gage are used by industry.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Exert upon the scraper only sufficient pressure to clean excess material from the face of the gage. NOTE 4—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.
Standard ASTM D1210
A count is made of the particles deposited in the two delimited areas, and cleanliness texture reading is determined. A superscript epsilon indicates an editorial change since the last revision or reapproval. It is preferable to scan from the shallow end toward the deep end, since c1210 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 In order that readings obtained with these arbitrary scales and modications can be reported in the preferred units, the approximate relationship aztm these scales to gage depth is shown in the following example: Keep the gage covered or encased at 2 5.