introduction
ИСО (Међународна организација за стандардизацију) је глобални савез националних тела за стандардизацију (Тела чланица ИСО). Развој међународних стандарда се обично спроводи преко ИСО техничких комитета. Свака институција чланица заинтересована за тему за коју је основан технички комитет има право да буде заступљена у тој комисији. Међународне владине и невладине организације које су у вези са ИСО такође су укључене у овај посао. ИСО блиско сарађује са Међународном електротехничком комисијом (ИЕЦ) о свим питањима електричне стандардизације.
International standards are drafted in accordance with the rules given in Part 2 ИСО/ИЕЦ директиве.
The main task of the technical committee is to develop international standards. The draft international standard adopted by the Technical Committee will be circulated to the member bodies for voting. Publication as an international standard requires approval by at least 75% of member institutions.
Please note that certain elements of this document may be subject to patent rights. ИСО није одговоран за идентификацију било ког или свих таквих патената.
ИСО 2846-2 was developed by the Technical Committee ISO/TC 130, Graphic Technology.
ИСО 2846-2-2017 Printing technology – Colour and transparency of four-colour printing inks – Део 2: cold-set offset lithography
The second edition cancels and replaces the first edition (ИСО 2846-2:2000), in which articles 4 и 5 have been technically revised and the colorimetric characteristics of the inks have been adjusted to meet the actual commercial requirements and process standard ISO 12647-3[1]. The details of test print preparation specified in ISO 2834-1 have now been removed.
ИСО 2846 consists of the following sections under the general heading Graphics Technology – Color and transparency of printing ink groups for four-colour printing:
– Део 1: Sheet-fed and heat-set web offset lithography
– Део 2: Cold-set offset lithography
– Део 3: Intaglio printing of publications
– Део 4: Screen printing
– Део 5: Flexographic printing
ИСО 2846-2-2017 Printing technology – Colour and transparency of four-colour printing inks – Део 2: cold-set offset lithography
увести
The first draft of ISO 2846-2 was written by ISO/TC 130 for material and process control. They examined the colorimetric properties of commercial cold-set web offset inks from around the world and found a set of color coordinates that adequately represented these color coordinates within reasonable tolerances. Since the first publication of this part of ISO 2846, additional coordination between the various national bodies involved in ISO/TC 130 has shown that some small improvements to the contrast color target will bring it more in line with the practical commercial printing requirements and process standard ISO 12647-3 [1].
This part of ISO 2846 will allow printers to obtain sets of printing inks from a variety of sources that will produce similar colors when printed on a reference substrate at the appropriate film thickness. This will allow the color separation of cold-set offset printing to be based on known color standards. The colorimetric properties specified in this part of ISO 2846 can only be obtained when the ink is printed on the reference substrate. Међутим, the similarity of the two inks on the reference substrate will ensure the similarity on the other substrate.
1 Домет
This part of ISO 2846 specifies the color and transparency of inks for four-color cold-set web offset printing when printed on a printability tester under specified conditions. It also describes testing methods to ensure consistency.
This part of ISO 2846 does not apply to fluorescent inks and does not specify pigments (or spectral reflectance) so as not to rule out future use of suitable pigment combinations and still claim to meet its colorimetric requirements.
ИСО 2846-2-2017 Printing technology – Colour and transparency of four-colour printing inks – Део 2: cold-set offset lithography
2 Нормативне референце
The following reference files are difficult or lacking for the use of this document. За датиране референце, примењује се само наведена верзија. За недатиране референце, a new version of the reference (укључујући све ревизије) примењује.
ИСО 536, paper and board – Determination of gram weight
ИСО 2471, Paper and board – Determination of opacity (paper backing) – Diffuse reflection method
ИСО 2834-1, Graphic techniques – Laboratory preparation of test prints – Део 1: Adhesive inks
ИСО 8791-4, Paper and board – Determination of roughness/smoothness (leak method) – Део 4: print-surfing method
ИСО 13655, Graphic Techniques – Spectral measurement and chrominance calculation of graphic art images
ANSI/ CGATS.5:2003, Graphic Techniques – Spectral measurement and chromaticity calculation of graphic art images
3 Одредбе и дефиниције
За потребе овог документа, примењују се следећи термини и дефиниције.
3.1 Cold set printing
Web offset printing without accelerated drying
Белешка 1: The ink collection is absorbed into the substrate.
3.2 Standard Ink
Inks for four-colour printing, when printed on a reference substrate and within the applicable ink film thickness range, comply with the colorimetric and transparency specifications in this part of ISO 2846
ИСО 2846-2-2017 Printing technology – Colour and transparency of four-colour printing inks – Део 2: cold-set offset lithography
3.3 Primary Colors
The color of individual prints with yellow, magenta and cyan inks
Белешка 1: If prints are produced in accordance with this part of ISO 2846 and comply with specified colorimetric characteristics, they are standard primary colors.
3.4 Транспарентност
The ability of an ink film to transmit light is usually expressed as some measure of unwanted scattering
3.5 Transparency measurement T
The inverse of the slope of the regression line between the film thickness and color difference of the overprint of color ink on black
Јаван је само одељак са стандардним информацијама. Да бисте видели цео садржај, морате купити стандард преко званичних канала.