What about ink dissolving and whitening in the mos

2022-08-24
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When printing with black ink, what to do if "ink dissolving" and "whitening" appear? Turn off the compressor; Press the power switch

release date: Source: chinaprint flexible packaging Views: 5522 copyright and disclaimer

core tip: as any packaging needs to print bar codes, black ink has become an indispensable ink in packaging and printing, but it is easy to appear "ink dissolving" and "whitening" when gravure printing black ink. With the deepening of composite material research and the extension of practical utilization, this paper attaches a solution

because any package needs to print bar codes, black ink has become an indispensable ink in packaging and printing, but it is easy to appear "ink dissolving" and "whitening" when gravure printing black ink. The solution is attached in this paper

it can be applied to a variety of environments and sudden problems in different occasions

black ink "dissolving ink" refers to that when ink or varnish of the same system is overprinted with black ink, the image and text edges of black ink printing will be virtualized, and this virtualized phenomenon will be elongated under the action of scraper, resulting in waste products, especially when varnish and black ink are overprinted, it is easier to produce black ink "dissolving ink", This is because the same solvent as black ink in varnish will dissolve black ink to a certain extent

"whitening" phenomenon is mainly caused by three reasons:

it is defined as: the stress value required to make the metal produce a constant creep deformation or creep speed within a specified time. First, the blackness of the ink itself is not enough; Second, there are some problems in the proportion of basic pigments used by ink manufacturers in the production of black ink. For example, in order to save costs, 50% of the finished black ink is added when using yellow, magenta and cyan basic pigments to prepare black ink; Third, the amount of black ink printing is too large, and the ink is reused too often

solution

appropriately change the black ink system to make it change with the ink overprinted on it. For example, when ester soluble varnish and ester soluble black ink are used, benzene free alcohol soluble black ink can be added to the ester soluble black ink in the proportion of 2:1, so that the system of black ink and varnish can be different, so as to eliminate the phenomenon of "ink dissolution" of black ink. This method is also applicable to the "whitening" phenomenon, and the effect is very good

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