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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The two protocols for reading the neness are: This area is equal to 6.
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. 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.
Protect gages that lie idle for extended periods of time from rust with an oil coating or oil soaked wrap.
Be sure the gage surface is free of lint. Any light coming through between scraper and gage face shows that the scraper has been damaged and is not satisfactory for use. Summary of Test Method 3. Avoid tapping or scratching with other metal.
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. D — 05 1-in.
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. D — 05 Reapproved Standard Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Gage1 This standard is issued under the xed designation D; the number immediately following the astmm indicates the year of original adoption or, in the case of revision, the year of last revision.
No further reproductions authorized. Calculate the texture cleanliness of the material using the following formula that weights aastm coarse fraction 3-mil side of gage 4 times heavier than the ne fraction 1-mil side.
ASTM D – Zehntner GmbH
A superscript epsilon indicates an editorial change since the last revision or reapproval. At some point in this path, particles or agglomerates, or both, will become visible. The two depths will be 3 mils, and 1 mil, or as agreed upon sstm the buyer and the seller. Three path widths are covered by this test method: NOTE d1120 is suggested that each side be counted only to a maximum of The top surface of the block shall be ground smooth and planar and shall contain one or two paths mm 5 in.
Rocking the scraper forward or back will reveal poor contact due to wear or warpage. Your comments are invited either for revision of this standard or for additional standards ast, should be addressed to ASTM International Headquarters.
Reduction should be in approximately the same proportion as the intermediate will be reduced in practice. Precision and Bias 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.
Permission rights to photocopy the standard may also be secured from the ASTM website www. At this stage, it is necessary to be able to judge if the pigment agglomerates have been sufficiently broken up so as not to interfere with the smoothness of the nished coating lm. Within 10 s of placing the specimen on the gage, make a reading as follows: Originally approved in It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Standard ASTM D1210
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Use a solvent and a soft cloth. Rounded to nearest 5 m or 0.
It may also be used to assess the inclusion of particulates by a cleanliness or d12100 rating. Report micrometer readings to the nearest multiple of 5 m and Hegman readings to the nearest 14 unit, 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 test method describes a way of making this judgment.
Exert upon the scraper only sufficient pressure to clean excess material from the face of the gage. 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.