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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Any light coming through between scraper and gage face shows that the scraper has been damaged and is not satisfactory for use. This is the neness reading. This standard has been approved for use by agencies of the Department of Defense. Do not consider any reading for the reported neness when the time lapse exceeds 10 s.
Precision and Bias The arrow in each drawing represents the end point reading for that distribution.
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. To be sure of an accurate grind reading, specimens must be free of air bubbles. The top surface of the block shall be ground smooth and planar and shall contain one or two paths mm 5 in. Three path widths are covered by this test method: 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 designation indicates the year of original adoption or, in the case of revision, the year of last revision.
A superscript epsilon indicates an editorial change since the last revision or reapproval. No further reproductions authorized.
A number in parentheses indicates the year of last reapproval. Keeping the gage between the operator and the light source, make the angle between the face of the gage A 0 to 8 specksB 9 to 15 specksand C 16 or more specks.
Reduction should be in approximately the same proportion as the intermediate will be reduced in practice. 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 Replace or recondition unsatisfactory blades.
The path will be cut to two different depths, each for half of its length. Permission rights to photocopy the standard may also be secured from the ASTM website www. Last previous edition approved in as D — This area is equal to 6. 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.
The two edges on the 3. Be sure the gage surface is free of lint.
Standard ASTM D1210
Ashm 10 s of placing the specimen on the gage, make a reading as follows: It may also ashm used to assess the inclusion of particulates by a cleanliness or texture rating. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. 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.
Average the two readings to the nearest 14 Hegman units 5 m.
A count is made of the particles deposited in the two delimited areas, and cleanliness texture reading is determined. Signicance and Use 4. Calculate the texture cleanliness of the material using the following formula that weights the coarse fraction 3-mil side of gage 4 times heavier than the ne fraction 1-mil side.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. There are 2 delimited sections on this gage, each of 6.
ASTM D Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Scale
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 d12100 contact edge by means of a strong light, placed behind the gage. Use a solvent and a soft cloth. Current edition approved Feb. When using the double-path gage, place material in both paths. Exert upon the scraper only sufficient pressure to clean excess material from the face of the gage. D — 05 1-in. Keep the gage covered or encased at 2 5.
When using the two-path gage, average the values in the two paths to the nearest 14 Hegman unit. In order that readings obtained with these arbitrary scales and modications can s1210 reported in the preferred units, the approximate relationship of these scales to gage depth is shown in the following example: Rounded to nearest 5 m or 0. Therefore, before testing, high-viscosity intermediate specimens that have little ability to ow should be reduced with a compatible liquid.