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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There are 2 delimited sections on this gage, each of 6. 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 asstm the drawdown.
ASTM D – Zehntner GmbH
Current edition approved Feb. Be sure the gage surface is free of lint. Users of this standard are c1210 advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Keeping the gage between the operator and the light source, make the atsm 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. Three ratings are indicated: Report micrometer readings to the nearest multiple of 5 m and Hegman readings to the nearest 14 unit, When using the two-path gage, average the values in the two paths to the nearest 14 Hegman asrm.
These patterns are to be used for notation of frequency of particles and should not be interpreted according to the size of the dots. Keep the gage covered or encased at 2 5. Any light coming through between scraper and gage face shows that the scraper has been damaged and is not satisfactory for use. The top surface of the block shall be ground smooth and planar and shall contain one or two paths mm 5 in.
This area is equal to 6. 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. 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.
Standard ASTM D1210
It d121 also be used to assess the inclusion of particulates by a cleanliness or texture rating. This standard has been approved for use by agencies of the Department of Defense.
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. When using the double-path gage, place material in both paths.
Keeping the gage between the operator and the light source, make the angle between the face of the gage Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
The interlaboratory test results from the previous c1210 of this method are valid, but because of the discrete nature of the data, a new analysis of the values needs to be done.
Precision and Bias NOTE 1—Several arbitrary scales and modications of the gage are used by industry.
Exert upon the scraper only sufficient pressure to clean excess material from the face of the gage. Rounded to nearest 5 m or 0. Reduction should be in approximately the same proportion as the intermediate will be reduced in practice. This is the neness reading. A count is made of the particles deposited in the two delimited areas, and cleanliness texture reading is determined. The two edges on the 3.
The arrow in each drawing represents the end point reading for that distribution. 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. Protect gages that lie idle for extended periods of time from rust with an oil coating or aatm soaked wrap.
A asttm epsilon indicates an editorial change since the last revision or reapproval.
ASTM D Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Scale
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. C Federation of Societies for Paint Technology scale.
Therefore, before testing, high-viscosity intermediate specimens astj have little ability to ow should be reduced with a compatible liquid.
Average the two readings to the nearest 14 Hegman units 5 m. 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. No further reproductions authorized. Within 10 s of placing the specimen on the gage, make a reading as follows: Determine the point in the particle distribution that approximates a similar end point pattern to that of the pictorial standards.
This process allows the two test readings to be made with limited time lapses between completion of drawdown and reading. The two depths will be 3 mils, and 1 mil, or as agreed upon between the buyer and the seller.