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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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. When using the two-path gage, average the values in the two paths to the nearest 14 Hegman unit. Exert upon the scraper only sufficient pressure to clean excess material from the face of the gage. This test method describes a way of making this judgment.
ASTM D Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Scale
A number in parentheses indicates the year of last reapproval. Within 10 s of placing the specimen on the gage, make a reading as follows: Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
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. NOTE 2—Wear or warpage of the scraper may be noted by facing the edge of the scraper down on d120 smooth level face of the gage, then inspecting the aastm edge by means of a strong light, placed behind the gage.
This area is equal to 6. No further reproductions authorized. The arrow in each drawing represents the end point reading for that distribution. Preferred calibrations are Hegman units and micrometers Note 1. Care of Gage 6.
The s1210 surface of the block shall be ground smooth and planar and shall contain one or two paths mm 5 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 d210 with intermediate calibrations in accordance with the depth at those points.
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. The two edges asttm the 3.
Keep the gage covered r1210 encased at 2 5. Use a solvent and a soft cloth. NOTE 1—Several arbitrary scales and modications of the gage are used by industry. Any light coming through between scraper and gage face shows that the scraper has been damaged and is not satisfactory for use. 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.
The interlaboratory test results from the previous revision of this method astmm valid, but because of the discrete nature of the data, a new analysis of the values needs to be done. The two depths will be 3 mils, and 1 mil, or as agreed upon between the buyer and the seller.
NOTE 7—It is suggested that each side be counted only to a maximum of Originally approved in Be sure the gage surface is free of lint.
Three ratings are indicated: Do not consider any reading for the reported neness when the time lapse exceeds 10 s. Your comments will receive careful consideration wstm a meeting of the responsible technical committee, which you may attend.
It is the responsibility of the user of this standard to establish appropriate safety asmt health practices and determine the applicability of regulatory limitations prior to use. This is the neness reading.
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: 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. The path will be cut to two different depths, each for half of its length.
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.
Standard ASTM D1210
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 A 0 to 8 specksB 9 to 15 specksand C 16 or more specks. Permission rights to photocopy the standard may also be secured from the ASTM website www.
A superscript epsilon indicates an editorial change since the last revision or reapproval. This process allows the two test readings to be made with limited time lapses between completion of drawdown and reading.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. This standard has been approved for use by agencies of the Department of Defense.
NOTE 5—For this test ashm 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 d1120 drawdown. Avoid tapping or scratching with other metal. These patterns are to be used for notation of frequency of particles and should not be interpreted according to the size of the dots.
D — 05 1-in. Three path widths are covered by this test method: