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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Exert upon the scraper only sufficient pressure to clean excess material from the face of the gage.
Within 10 s of placing the specimen on the gage, make a reading as follows: Permission rights to photocopy the standard may also be secured from the ASTM website www. Reduction should be in approximately the same proportion f1210 the intermediate will be reduced in practice. Precision and Bias When using the double-path gage, v1210 material in both paths. Current edition approved Feb. The two depths will be 3 mils, and 1 mil, or as agreed upon between the buyer and the seller.
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. Avoid tapping or scratching with other metal. A viewing box is not mandatory for illumination, but if one is desired, a proposed design for a axtm box is contained in Appendix X1. Three path widths are covered by this test method: At this stage, it is necessary asfm 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.
Keeping the gage between the operator and the light astn, 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 interlaboratory test results from dd1210 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.
This area is equal to 6. These patterns are to be used for notation of frequency of particles and should not be interpreted according to the size of the dots.
A number in parentheses indicates the year of last reapproval.
No further reproductions authorized. Protect gages that lie idle for extended periods of time from rust with an oil coating or oil soaked wrap. 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 some point in this path, particles or agglomerates, v1210 both, will become visible.
ASTM D Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Scale
Three ratings are indicated: It may also be used to assess the inclusion of particulates by a cleanliness or texture rating. This process allows the two test readings to be made with limited time lapses between completion of drawdown and reading.
The two edges on the 3. NOTE 7—It is suggested that each side be counted only to a maximum of Average the two readings to the nearest 14 Hegman units 5 m. Keep the gage covered or encased at 2 5. There are 2 delimited sections on this gage, each of 6. Originally approved in This standard has been approved for use by agencies of the Department of Defense.
Standard ASTM D1210
Do not consider any reading for the reported neness when the time lapse exceeds 10 s. 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 values given in parentheses are for information only. Keeping the gage between the operator and the light source, make the angle between the face of the gage 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 will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Determine the point in the particle distribution that approximates a similar end point pattern to that of the pictorial standards. 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. In order dd1210 readings obtained with these d12210 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: Care of Gage 6.
Summary of Test Method 3. C Federation of Societies for Paint Technology scale.
ASTM D – Zehntner GmbH
Any light coming through between scraper and gage face shows that the scraper has been damaged and is not satisfactory for use. Preferred calibrations are Hegman units and micrometers Note 1.
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. 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.
This is the neness reading. A superscript epsilon indicates an editorial change since the last revision or reapproval.