阅读说明：本技术 一种极深专色油墨印刷方法 (Printing method of ultra-deep spot color ink ) 是由 杨国伟 杨国强 于 2021-09-07 设计创作，主要内容包括：本发明公开了一种极深专色油墨印刷方法,包括以下步骤：S1、根据印刷要求将油墨厚度拆分成0.075厚度专色油墨,以及剩余厚度专色油墨两部分；S2、S1中剩余厚度部分根据专色油墨的Lab数据转换成合适的CMYK成分；S3、根据S2转化好的数据调制四色油墨,与专色油墨进行展色模拟,测量展色Lab数据,要求ΔE≤1.5；S4、将专色油墨与四色模拟油墨分别安排在同一印刷机的不同色座上,四色模拟油墨打底,上面叠印专色油墨,只上一次机印刷即可达到要求。本发明采用专色墨与普通四色墨叠加的方式,四色模拟油墨打底,上面叠印专色油墨,使极深专色只需要上机一次即可完成印刷有效的提高生产效率。(The invention discloses a printing method of ultra-deep spot color ink, which comprises the following steps: s1, splitting the ink thickness into spot color ink with the thickness of 0.075 and spot color ink with the residual thickness according to the printing requirement; the remaining thickness portions in S2 and S1 are converted into proper CMYK components according to Lab data of the spot color ink; s3, modulating four-color ink according to the converted data of S2, performing color spreading simulation with spot color ink, and measuring color spreading Lab data, wherein delta E is required to be less than or equal to 1.5; and S4, respectively arranging the spot color ink and the four-color simulation ink on different color seats of the same printing machine, priming the four-color simulation ink, overprinting the spot color ink, and only printing on the machine once to meet the requirement. The invention adopts a mode of superposing special ink and common four-color ink, the four-color simulation ink is used for priming, and the special color ink is overprinted on the four-color simulation ink, so that the printing of extremely deep special color can be finished only by one-time operation, and the production efficiency is effectively improved.)

1. A printing method of ultra-deep spot color ink is characterized by comprising the following steps:

s1, splitting the ink thickness into spot color ink with the thickness of 0.075 and spot color ink with the residual thickness according to the printing requirement;

the remaining thickness portions in S2 and S1 are converted into proper CMYK components according to Lab data of the spot color ink;

s3, modulating four-color ink according to the converted data of S2, performing color spreading simulation with spot color ink, and measuring color spreading Lab data, wherein delta E is required to be less than or equal to 1.5;

and S4, respectively arranging the spot color ink and the four-color simulation ink on different color seats of the same printing machine, priming the four-color simulation ink, overprinting the spot color ink, and only printing on the machine once to meet the requirement.

2. The method of claim 1, wherein the print thickness requirement for the S1 residual thickness spot ink is the ink bulk thickness minus 0.075.

3. The method of claim 1, wherein the residual thickness portion of S1 is converted into appropriate CMYK components according to Lab data of spot color ink, and the CMYK mode is a subtractive color mode.

4. The method of claim 1, wherein the four-color ink is prepared according to the converted data of S2, and the color spreading simulation is performed with the spot color ink, and the measured data of color spreading Lab is 1.5. ltoreq. DELTA.E < 2.

5. The method of claim 1, wherein the four-color ink is prepared according to the converted data of S2, and color spreading simulation is performed with the spot color ink, and the measured color spreading Lab data requires Δ E of 1.5.

6. The method according to claim 1, wherein the spot color ink and the four-color analog ink are arranged on different color seats of the same printing machine, the four-color analog ink is used as a base, the spot color ink is overprinted on the base, and the ratio of the four-color analog ink to the spot color ink is 1: 1-1.5.

7. The method according to claim 1, wherein the spot color ink and the four-color analog ink are arranged on different color seats of the same printing machine, the four-color analog ink is used as a base, the spot color ink is overprinted on the base, and the ratio of the four-color analog ink to the spot color ink is 1: 1.

8. the printing method of the extremely deep spot color ink as claimed in claim 1, wherein the color effect of the spot color ink is simulated by performing color matching and color spreading verification on CMYK four-color ink according to the split component data.

9. The method of claim 1, wherein the spot color ink and the four-color analog ink are arranged on different color seats of a same printing machine, the four-color analog ink is used as a base, the spot color ink is overprinted on the base, and the printing time interval between the four-color analog ink and the spot color ink is greater than 0.5 s.

10. The method according to claim 1, wherein the spot color ink and the four-color analog ink are arranged on different color seats of a same printer, the four-color analog ink is used as a base, the spot color ink is overprinted on the base, and the printing thickness of the four-color analog ink is larger than that of the spot color ink.

Technical Field

The invention relates to the technical field of package printing, in particular to a printing method of ultra-deep spot color ink.

Background

The spot color ink refers to specific color ink which is mixed in advance, such as fluorescent yellow, pearl blue, metallic gold and silver ink and the like, and is not mixed by CMYK four colors, and color register means accurate color.

The method generally adopted by the ultra-deep spot color printing is as follows: the prepared special color ink is directly used and is printed twice or three times according to requirements to achieve the final effect. Although the final effect can be achieved by the mode, repeated printing is needed, and the efficiency is low; meanwhile, the thickness of the printing ink is greatly increased after the printing is carried out for many times, the printing ink can be completely dried after being placed for several days after the printing is finished, and the waiting time is long; while an increase in print thickness can also cause quality problems. Therefore, the invention provides a printing method of the ultra-deep spot color ink, which aims to solve the problems in the background art.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides an extremely deep spot color printing method.

In order to achieve the purpose, the invention adopts the following technical scheme:

a printing method of ultra-deep spot color ink comprises the following steps:

s1, splitting the ink thickness into spot color ink with the thickness of 0.075 and spot color ink with the residual thickness according to the printing requirement;

the remaining thickness portions in S2 and S1 are converted into proper CMYK components according to Lab data of the spot color ink;

s3, modulating four-color ink according to the converted data of S2, performing color spreading simulation with spot color ink, and measuring color spreading Lab data, wherein delta E is required to be less than or equal to 1.5;

and S4, respectively arranging the spot color ink and the four-color simulation ink on different color seats of the same printing machine, priming the four-color simulation ink, overprinting the spot color ink, and only printing on the machine once to meet the requirement.

Preferably, the print thickness requirement for the S1 residual thickness spot color ink is the ink bulk thickness minus 0.075.

Preferably, the remaining thickness portion in S1 is converted into appropriate CMYK components according to Lab data of spot color ink, the CMYK mode being a subtractive mode.

Preferably, four-color ink is prepared according to the converted data of S2, color spreading simulation is carried out on the four-color ink and the spot color ink, and the measured color spreading Lab data requires that the delta E is more than or equal to 1.5 and less than 2.

Preferably, four-color inks are prepared according to the converted data of S2, color-spreading simulation is performed with spot-color inks, and color-spreading Lab data is measured, so that Δ E is required to be 1.5.

Preferably, the spot color ink and the four-color simulation ink are respectively arranged on different color seats of the same printing machine, the four-color simulation ink is used for priming, the spot color ink is overprinted on the four-color simulation ink, and the ratio of the four-color simulation ink to the spot color ink is 1: 1-1.5.

Preferably, the spot color ink and the four-color simulation ink are respectively arranged on different color seats of the same printing machine, the four-color simulation ink is used for priming, the spot color ink is overprinted on the four-color simulation ink, and the ratio of the four-color simulation ink to the spot color ink is 1: 1.

preferably, color matching and color spreading verification is performed by using CMYK four-color ink according to the split component data, and the color effect of spot color ink is simulated.

Preferably, the spot color ink and the four-color simulation ink are respectively arranged on different color seats of the same printing machine, the four-color simulation ink is used for priming, the spot color ink is overprinted on the four-color simulation ink, and the printing time interval of the four-color simulation ink and the spot color ink is more than 0.5 s.

Preferably, the spot color ink and the four-color simulation ink are respectively arranged on different color seats of the same printing machine, the four-color simulation ink is used for priming, the spot color ink is overprinted on the four-color simulation ink, and the printing thickness of the four-color simulation ink is larger than that of the spot color ink.

The printing method of the extremely deep spot color ink adopts a mode of superposing the special color ink and the common four-color ink, the four-color simulation ink is used for priming, and the spot color ink is overprinted on the four-color simulation ink, so that the extremely deep spot color can be printed only by one-time operation, and the production efficiency is effectively improved. Compared with the old printing method, the printing thickness of the superposition mode is lower, the printing is easier to dry, and the printing quality is higher.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.

Example one

A printing method of ultra-deep spot color ink comprises the following steps:

s1, splitting the ink thickness into spot color ink with the thickness of 0.075 and spot color ink with the residual thickness according to the printing requirement;

the remaining thickness portions in S2 and S1 are converted into proper CMYK components according to Lab data of the spot color ink; the CMYK mode is a subtractive color mode;

s3, modulating four-color ink according to the converted data of S2, performing color spreading simulation with spot color ink, measuring color spreading Lab data, and simulating the color effect of the spot color ink, wherein delta E is required to be 1.5;

and S4, respectively arranging the spot color ink and the four-color simulation ink on different color seats of the same printing machine, priming the four-color simulation ink, overprinting the spot color ink, and only printing on the machine once to meet the requirement.

The special color ink and the four-color simulation ink are respectively arranged on different color seats of the same printing machine, the four-color simulation ink is used for priming, the special color ink is overprinted on the four-color simulation ink, and the proportion of the four-color simulation ink to the special color ink is 1: 1, and the printing thickness of the four-color simulation ink is larger than that of the spot color ink.

Example two

A printing method of ultra-deep spot color ink comprises the following steps:

s1, splitting the ink thickness into spot color ink with the thickness of 0.075 and spot color ink with the residual thickness according to the printing requirement;

the remaining thickness portions in S2 and S1 are converted into proper CMYK components according to Lab data of the spot color ink; the CMYK mode is a subtractive color mode;

s3, modulating four-color ink according to the converted data of S2, performing color spreading simulation with spot color ink, measuring color spreading Lab data, and simulating the color effect of the spot color ink, wherein delta E is required to be 1.8;

and S4, respectively arranging the spot color ink and the four-color simulation ink on different color seats of the same printing machine, priming the four-color simulation ink, overprinting the spot color ink, and only printing on the machine once to meet the requirement.

The special color ink and the four-color simulation ink are respectively arranged on different color seats of the same printing machine, the four-color simulation ink is used for priming, the special color ink is overprinted on the four-color simulation ink, and the proportion of the four-color simulation ink to the special color ink is 1: 1.5, and the printing thickness of the four-color simulation ink is larger than that of the spot color ink.

EXAMPLE III

A printing method of ultra-deep spot color ink comprises the following steps:

s1, splitting the ink thickness into spot color ink with the thickness of 0.075 and spot color ink with the residual thickness according to the printing requirement, wherein the spot color ink with the residual thickness is obtained by subtracting 0.075 from the whole ink thickness;

the remaining thickness portions in S2 and S1 are converted into proper CMYK components according to Lab data of the spot color ink; the CMYK mode is a subtractive color mode;

s3, modulating four-color ink according to the converted data of S2, performing color spreading simulation with spot color ink, measuring color spreading Lab data, and simulating the color effect of the spot color ink, wherein delta E is required to be 2.0;

s4, respectively arranging spot color ink and four-color simulation ink on different color seats of the same printing machine, priming the four-color simulation ink, overprinting the spot color ink, and mixing the four-color simulation ink and the four-color simulation ink in a ratio of 1: 1.4, the requirement can be met only by one-time machine printing.

Example four

A printing method of ultra-deep spot color ink comprises the following steps:

s1, splitting the ink thickness into spot color ink with the thickness of 0.075 and spot color ink with the residual thickness according to the printing requirement;

the remaining thickness portions in S2 and S1 are converted into proper CMYK components according to Lab data of the spot color ink; the CMYK mode is a subtractive color mode;

s3, modulating four-color ink according to the converted data of S2, performing color spreading simulation with spot color ink, measuring color spreading Lab data, and simulating the color effect of the spot color ink, wherein delta E is required to be 1.2;

s4, respectively arranging spot color ink and four-color simulation ink on different color seats of the same printing machine, priming the four-color simulation ink, overprinting the spot color ink, and mixing the four-color simulation ink and the four-color simulation ink in a ratio of 1: 1.3, the requirement can be met only by one-time machine printing.

EXAMPLE five

A printing method of ultra-deep spot color ink comprises the following steps:

s1, splitting the ink thickness into spot color ink with the thickness of 0.075 and spot color ink with the residual thickness according to the printing requirement;

the remaining thickness portions in S2 and S1 are converted into proper CMYK components according to Lab data of the spot color ink; the CMYK mode is a subtractive color mode;

s3, modulating four-color ink according to the converted data of S2, performing color spreading simulation with spot color ink, measuring color spreading Lab data, and simulating the color effect of the spot color ink, wherein delta E is required to be 1.5;

s4, respectively arranging spot color ink and four-color simulation ink on different color seats of the same printing machine, priming the four-color simulation ink, overprinting the spot color ink, and mixing the four-color simulation ink and the four-color simulation ink in a ratio of 1: 1.2, the requirement can be met only by one-time machine printing.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.