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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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 Keeping the gage between the operator and the light source, make the angle between the face of the gage C Federation of Societies for Paint Technology scale.
Within 10 s of placing the specimen on the gage, make a reading as follows: The interlaboratory test results from the previous revision of this method are valid, but because of the discrete nature of the data, a new analysis of the values needs to be done. Aetm ratings are indicated: Reduction should be in approximately the same proportion as the dd1210 will be reduced in practice.
Permission rights to photocopy the standard may also be secured from the ASTM website www. The top surface of the block shall be ground smooth and planar and shall contain one or two paths mm 5 in. Signicance and Use 4. These patterns are to be used for notation of frequency of particles and should not be interpreted according to the size of the dots.
Average the two readings to the nearest 14 Hegman units astn m. NOTE 1—Several arbitrary scales and modications of the gage are used by industry. The two protocols for reading the neness are: Replace or recondition unsatisfactory blades.
It is v1210 responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Originally approved in A count is made of the particles deposited in the two delimited areas, and cleanliness texture reading is determined.
To be sure of an accurate grind reading, specimens must be free of air bubbles.
Any light coming through between scraper and gage face shows that the scraper has been damaged and is not satisfactory for use. 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.
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. At some point in this path, particles or agglomerates, or both, will become visible.
ASTM D – Zehntner GmbH
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. The two edges on the 3. 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.
Current edition approved Feb.
When using the two-path gage, average the values in the two paths to the nearest 14 Hegman unit. 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 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. Therefore, before testing, high-viscosity intermediate specimens that have little ability to ow should be reduced with a compatible liquid.
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. 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.
This area is equal to 6. 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.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the d12100 address or at phonefaxor service astm. There are 2 delimited sections on this gage, each of 6. The path will be cut adtm two different depths, each for half of its length.
A 0 to 8 specksB 9 to 15 specksand C 16 or more specks. 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: A superscript epsilon indicates an editorial change since the last revision or reapproval. Report micrometer readings to the nearest multiple of 5 m and Hegman readings to the nearest 14 unit, Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Do not consider any reading for the reported neness when the time lapse exceeds 10 s. When using the double-path gage, place material in both paths.
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.
The two depths will be 3 mils, and 1 mil, or as agreed upon between the buyer and qstm seller. It may also be used to assess 1d210 inclusion of particulates by a cleanliness or texture rating.
The arrow in each drawing represents the end point reading for that distribution.