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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D — 05 1-in. D11210 previous edition approved in as D — Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Standard ASTM D1210
Within 10 s of placing the specimen on the gage, make a reading as follows: 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 area is equal to 6.
Care of Gage 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. Keeping the gage between the operator and the light source, make the angle between the face of the gage Precision and Bias The arrow in each drawing represents the end point reading for that distribution.
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. Do not consider any reading for the reported neness when the time lapse exceeds 10 s. Use a solvent and a soft cloth. When using the two-path gage, average the values in the two paths to the nearest 14 Hegman unit.
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. Preferred calibrations are Hegman units and micrometers Note 1. Three path widths are covered by this test method: The two depths will be 3 mils, and 1 mil, or as agreed upon between the buyer and the seller. 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.
Rocking the scraper forward or back will reveal poor contact due to wear or warpage. Be sure the gage surface is free of lint. No further reproductions authorized. Three ratings are indicated: 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. The values given in parentheses are for information only.
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. Protect gages that lie idle for extended periods of time from rust with an oil coating or oil soaked wrap. These patterns are to be used for notation of frequency of particles and should not be interpreted according to the size of the dots.
Permission rights to photocopy the standard may also be secured from the ASTM website www. 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.
Report micrometer readings to the nearest multiple of 5 m and Hegman readings to the nearest 14 unit, Originally approved in A count is made of the particles deposited in the two delimited areas, and cleanliness texture reading is determined.
NOTE 1—Several arbitrary scales and modications of the gage are used by industry. This process allows the two test readings to be made with limited time lapses between completion of drawdown and reading.
When using the double-path gage, place material in both paths. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
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.
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. 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 d12210 adoption or, d1201 the case of revision, the year of last revision.
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: This standard has been approved for use by agencies of the Department of Defense.
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. The two protocols for reading the neness are: Signicance and Use 4. This average is considered one reading.