4.1 Laboratory proofing of ink is necessary to establish a reproducible prediction of print appearance and performance properties, most of which are highly sensitive to ink film thickness. The apparatus described in this practice has found wide use for routine control proofing because it provides an economical method for producing reasonably large prints at film thicknesses comparable to those obtained on production presses.4.2 This practice does not duplicate the dynamics of a high speed press, nevertheless, it is useful for quality control and for specification acceptance between the producer and the user where there is an agreed upon specification for reflection density or standard reference print.1.1 This practice covers the procedure for preparing prints of paste inks using a hand operated flat-bed laboratory proof press. The initial method was developed by the National Printing Ink Research Institute.21.2 This practice is applicable to the preparation of single-color solid-area prints by the dry offset process (also known as Letterset) on a flat substrate such as paper or metal. It can readily be adapted to print by direct letterpress.3NOTE 1: The proofing press described in this practice can also be used with printing gages in accordance with Practice D6846.1.3 This practice is applicable primarily to lithographic and letterpress inks that dry by oxidation or penetration. With the addition of appropriate drying or curing equipment, it is also applicable to other systems such as heat-set or energy-curable.1.4 The instructions in this practice are intended to minimize the within-print and among-operator variability inherent in hand operations.1.5 This practice does not measure the actual film thickness on the print, but evaluates film thickness equivalence by visual or instrumental comparisons of reflection density.1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the users of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific precautions are given in Section 7.1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
定价: 590元 / 折扣价: 502 元 加购物车
This specification covers manually operated fueling hose reels for use with collapsible and noncollapsible hose. Fueling hose reels shall be of one of the following types as specified: type 1, type 2, type 3, and type 4. The hose reel shall be of a durable, rigid construction, as light in weight and compact as practicable. The reel drum may have either smoothly formed flat sides or suitable spoke ribs, so formed as not to damage the hose. Reels shall be provided with a holding brake to lock the reel in any position. The reel shall be fitted with a device for clamping the hose nozzle securely to the reel to prevent unwinding of the hose and damage to the nozzle. The reel hub discharge shall be angled to provide a smooth tangential contact of the hose with the reel drum. The reel shall have an aromatic fuels tight rotating joint between reel inlet connection and the rotating hub on the reel drum. The reel inlet connection shall be flanged, the flange being part of the rotating swivel joint. Hydrostatic tset and operating test shall be performed to meet the requirements prescribed.1.1 This specification covers manually operated fueling hose reels for use with collapsible and noncollapsible hose.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.3 The following precautionary caveat pertains only to the test methods portion, Section 12 of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
定价: 590元 / 折扣价: 502 元 加购物车