ASTM D6073-2008 373 Standard Test Method for Relative Setting of Heatset Printing Inks by the Heatset Tester.pdf
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1、Designation: D 6073 08Standard Test Method forRelative Setting of Heatset Printing Inks by the HeatsetTester1This standard is issued under the fixed designation D 6073; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method describes the procedure for determin-ing the relative setting speed of heatset inks using a specifict
3、ester consisting of a forced hot air oven and print deliverysystem.1.2 This test method is applicable to printing inks intendedto be dried by the application of heat and for which a suitablereference standard is available.1.3 Although heatset inks are normally printed by the offsetprocess, this test
4、 method specifies the direct letterpress modebecause the higher ink film thicknesses obtained tend toamplify subtle differences in ink setting speed.1.4 This tester reads temperature and belt speed in nonmet-ric terms; therefore, instrument settings in this test method arestated first in U.S. Custom
5、ary Units (inch pound units ofmeasurements). The values given in parentheses are for infor-mation only.1.5 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not co
6、nsidered standard.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to u
7、se.2. Referenced Documents2.1 ASTM Standards:2D 1316 Test Method for Fineness of Grind of Printing InksBy the NPIRI GrindometerD 6846 Practice for Preparing Prints of Paste Printing Inkswith a Printing Gage3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 heatset printing ink, n
8、an ink typically containingaliphatic hydrocarbon solvents that evaporate at elevatedtemperatures.4. Summary of Test Method4.1 A printing gage is used to prepare a laboratory printcontaining both the test sample and a standard ink. The freshlyprepared print is immediately subjected to forced hot air
9、in thetester, which is initially set at 350F (177C) and a belt speedof 30 fpm (0.15 m/s).4.2 The print is cooled, overlaid with a clean sheet of stock,passed through the printing apparatus, and examined for setoff.4.3 The process is repeated at different belt speeds ortemperatures until either the t
10、est sample or the standardexhibits setoff and the other does not, or it is established thatboth are the same. The sample is then reported to dry fasterthan, slower than, or equal to the standard.5. Significance and Use5.1 The setting speed of heatset printing inks is importantbecause it influences t
11、he efficiency of the drying process. Thistest method provides a means for comparing the setting of aheatset ink directly against a standard at the same conditions oftemperature and exposure time. While the method does notdetermine the setting speed of an ink on a production press, itis useful for sp
12、ecification acceptance between the supplier andthe customer.5.2 The setting speed of a printing ink depends on a numberof variables such as the stock on which it is printed, the filmthickness on the print, the temperature of the forced air, the rateof air flow, and the time that the print is subject
13、ed to heat. Forthese reasons, it is important to conduct the tests underconditions that are controlled and as realistic as practical.6. Apparatus6.1 Tester, equipped with a forced hot air oven and printdelivery system. The air temperature can be adjusted between100 and 600F (38 and 315C) and the spe
14、ed of the printdelivery unit between 0 and 100 fpm (0 and 0.5 m/s). The print1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.56 on Printing Inks.Current edition approved Fe
15、b. 15, 2008. Published April 2008. Originallyapproved in 1996. Last previous edition approved in 2001 as D 6073 - 96 (2001).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, r
16、efer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.delivery system allows the print to be exposed to hot ai
17、r fromthe top and bottom at the same time.6.2 Laboratory Flatbed Printing Apparatus.6.3 Printing Gage,3conforming to Practice D 6846, consist-ing of a type-high block of steel 0.918 in. (23.3 mm) in height;the top surface is precision-machined to contain a singleconstant-depth path approximately 3 b
18、y 712 in. (76 by 190mm), which is inked by means of a drawdown blade. A milleddepth of 0.4 mils (10 m) is recommended for coated paper andother smooth substrates. Deeper plates may be necessary forrougher substrates. Typical path depths and corresponding inkfilm thicknesses are given in Table 1.6.4
19、Drawdown Blade,34 in. (102 mm) in length, so as tospan the width of the printing gage.6.5 Metal Surface, to cool the print immediately after it haspassed through the tester.6.6 Metal Block,3type-high, of similar top dimensions asthe printing gage.7. Materials7.1 Standard Heat-set Ink, as agreed upon
20、 between thesupplier and the customer. The standard ink must be of thesame color and transfer characteristics as the test ink. This inkshould not be so old that changes in properties have occurredsince its manufacture.7.2 Printing Substrate, such as paper, paperboard or other asagreed upon between t
21、he supplier and customer, cut to 812 by11 in. (216 by 280 mm) or other size appropriate to the printingapparatus.7.3 Carrier, consisting of a sheet of cardboard approxi-mately 812 by 11 in. (216 by 280 mm), with a hole cut in thecenter that is slightly larger than the size of the print producedby th
22、e laboratory printing apparatus.7.4 Setoff Sheet, cut to the same size as the printing substrate(7.2). If the printing substrate is paper, film or foil, use the samematerial. If paperboard, use coated paper 5 to 6 mils (1.1 to 1.4m) in thickness.7.5 Wash-up Materials, including an appropriate solven
23、tand lint free rags or tissues.8. Sampling and Test Specimen8.1 Carefully select a sample that is free of skin and othercontamination and representative of the lot being evaluated.The minimum sample per print is less than 0.034 oz. (1 mL).Transfer to a clean container, protect with skin paper, close
24、 andseal.8.2 When ready to make a print, remove enough sample forone test, then close and reseal the container.9. Preparation of Apparatus9.1 Tester:9.1.1 Prior to operation of the tester, carefully read theinstructions in the manufacturers literature.9.1.2 Set the tester on a work bench in a labora
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