Standard Practice for Preparing Prints of Paste Printing Inks with a Printing Gage

Importancia y uso:

4.1 Laboratory proofing of inks 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.

FIG. 1 Schematic Diagram of Printing Gages (not drawn to scale)

4.2 A unique advantage of printing gages is that, depending on the design selected, prints can be produced at a range of tapered film thicknesses or at several levels of uniform thicknesses in a single proofing. Because of the built-in film thickness control, ink metering is not necessary. Relatively small quantities of test samples are used, and less than two minutes are required to ink a gage, pull a letterpress print, and clean up. In addition, problems due to ink distribution systems are eliminated, two inks may be proofed at the same time, and multi-color printing is possible.

4.3 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.

Subcomité:

D01.56

Referida por:

D6487-10R19, D1316-20, D6073-08AR20

Volúmen:

06.02

Número ICS:

87.080 (Inks. Printing inks)

Palabras clave:

flat-bed (offset) proof press; paste printing inks; printing gage; printing inks; proofing of inks;