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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Last previous edition approved in as D — Protect gages that aatm idle for extended periods of time from rust with an oil coating or oil soaked wrap. There astn 2 delimited sections on this gage, each of 6. To be sure of an accurate grind reading, specimens must be free of air bubbles. This average is considered one reading. Current edition approved Feb. A number in parentheses indicates the year of last reapproval.
NOTE 2—Wear or warpage of d110 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. Replace or recondition unsatisfactory blades.
Any light coming through between scraper and gage face shows that the scraper has been damaged and is not satisfactory for use. Average the two readings to the nearest 14 Hegman units 5 m. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
D — 05 1-in. Keeping the gage between the operator and the asmt source, make the angle between the face of the gage NOTE 5—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. Preferred calibrations are Hegman units and micrometers Note x1210.
Originally approved in A 0 to 8 specksB 9 to 15 specksand C 16 or more specks. This is the neness reading.
It may also be used to assess the inclusion of particulates by a cleanliness or texture rating. This process allows the two test readings to be made with limited time lapses between completion of drawdown and reading.
Standard ASTM D1210
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. 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. Rounded to nearest 5 m or 0.
A superscript epsilon indicates an editorial change since the last revision or reapproval. Reduction should be in approximately the same proportion as the intermediate will be reduced in practice.
Precision and Bias Three path widths are covered by this test method: NOTE 1—Several arbitrary scales and modications of the gage are used by industry. 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.
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, The values given in parentheses are for information only. 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.
The path will be cut to two different depths, each for half of its length. 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.
Permission rights to photocopy the standard may also be secured from the ASTM website www. At some point in this sstm, particles or agglomerates, or both, will become visible. This test method describes a way of making this judgment. 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.
In order that readings obtained with these arbitrary scales and modications can be reported in the preferred units, the approximate relationship of these scales to gage depth is shown in the following example: Rocking the scraper forward or back will reveal poor contact due to wear or warpage. Exert upon the scraper only sufficient pressure to clean excess material from the face of the gage.
The two edges on the 3. Keep the gage covered or encased at 2 5. Determine the point in the particle distribution that approximates a similar end point pattern to that of the pictorial standards.