First, let ’s talk about the current color limitations of traditional printing. Due to the relatively narrow color gamut of traditional four-color printing, it is impossible to fully reproduce the original tone range. In addition, most of the current design processes are based on RGB color gamut. Traditional printing standards have been Unable to meet the needs of customers, with the development of CTP, FM screening and multi-color printing machines in recent years, the original true color separation technology has been spawned.

The CMY color ink we actually use is not consistent with the ideal, for example, red and blue are relatively dirty, so the final output color may not be able to produce the input color as expected. Aiming at reproducing the wide color gamut of RGB, the 4-color printing ink is used to expand the color gamut to approach the RGB color space, thus a series of multi-color printing separation technologies were born. For example, Pantone Hexachrome, Hi-Fi Color, multi-Color.

As early as IGAS 2007, a wide-gamut four-color ink printing technology has been introduced, and its display on different materials and screens can be consistent, and far exceeds the color gamut performance of traditional four-color inks. Also displayed are six-color prints, which are rich in color and three-dimensional, very close to the RGB color gamut space.

In general, the Hi-Fi Color technology that can achieve 7-color separation printing requires a 7-color printing machine; the 6-color separation technology using Pantone Hexachrome requires a 6-color printing machine in the printing process; and for wide-color gamut four-color inks Kaleid0, just need an ordinary four-color printing machine. Multi-Color's multi-color separation technology can freely combine more than four colors of multi-color separation, and can also replace any one or several colors in the four-color ink with the specified spot color.

Then, to achieve true color printing, the first conditions that must be met include:

1. Effective color management and standardization of the production environment from pre-press to printing.
2. With CTP and effective control Use FM SCREEN printing to achieve high density printing.
3. Understand the color coordination of ink and paper in the printing process, and achieve the most ideal concentration.
4. With measurement tools, in addition to measuring density, a spectrodensitometer and a colorimeter that can measure Lab / LCH / HSB are also required.
5. With the production of ICC Profile software, such as Pantone Hexachrom (6c), Hi-Fi Color (7C) Multi-Color (multi-color) special color separation / production software.

Compared with AM, FM avoids the problems caused by the arrangement of dot angles, and the color performance is more delicate, especially the second-generation FM technology. In the thickness of the ink layer, if you need to increase the density, AM needs to continue to increase the ink layer, and FM because the dot itself is small, no ink layer accumulation will occur.

And when the thickness of the ink layer reaches a certain limit, the color of the ink begins to saturate, and the density can no longer rise. Therefore, to find the optimal concentration, you can use a spectrodensitometer to measure the LCH value during the test (L is the brightness of the color, C is the saturation of the color, and H is the hue of the color). When the ink is added from light to dark, just look at the C saturation value is the largest, this is the most ideal density.

In addition to the density value, another index we often need to refer to is the print contrast. The printing contrast can represent the printing quality and the details of the dark tone. This is the comparison between the color density on the spot and the dark tone density (generally 75% or 80% darkness is selected for measurement). If the maximum C (color) has been found The value but the contrast percentage is not optimal. In order to maintain the optimal color saturation of the ink, the curve can be modified by CTP to achieve the goal.

After finding the optimal concentration, the color reproduction efficiency of the ink can be evaluated by measuring the HSB value of each color ink. HSB is another way to express color in different terms in LAB color space. The coordinates of each point are defined as:

H represents the hue of (Hue) color.
S represents (Satu ration) saturation.
B represents (Brightness) brightness. [next]

Knowing the above, let's take a look at some of the features of wide color gamut ink Kaleido:

1. The sharpness (C value) of yellow, red and blue is improved. Due to the use of high-definition pigments, the sharpness has been improved compared to previous inks.
2. The color development of secondary and tertiary colors is improved. Since the C value has been improved, reproduction of color areas that was not possible with four-color printing has become possible.
3. Improvement of gloss. The use of highly soluble resins improves the dispersibility of the pigments and greatly improves the gloss.

Obviously, Kaleido ink has a wider color gamut space than traditional four-color ink. Through the comparative analysis of sample samples, we found that:

1. In the color gamut of 4-color IapanColor ink, the hue from yellow to red is fuller and brighter.
2. Increase the sharpness in the red part.
3. The color gamut of magenta and purple-blue parts has been significantly improved. The colors that were not possible with 4C inks before can now be reproduced.
4. The color gamut of bright blue and bright green has also been improved, making the colors more vivid.

In the actual testing process, the matters needing attention are:

1. The hue of Kaleido is different from the ordinary hue (Japan Color). Since the turbidity is removed from the ink hue, the concentration will be reduced visually. A density meter is used to thoroughly control the concentration and measure the humidity (Wet data) and dryness (Dry data) separately.
2. As the hues of yellow, red, and blue become brighter, the visual sense of density is lower than that of ordinary ink. Compared with other printing standards, high-density printing (about 1.2-1.3 times) is necessary. It is recommended to use the FM SCREEN printing method of printable film to achieve this high density printing.

Then we come to talk about Pantone Hexachrome and Hi-Fi Color separation technology.

Since the traditional four colors express the colors of the original through the superposition of different color ratios, it is easy to produce problems such as inaccurate overprinting, and the performance range is relatively narrow. The color Blue constitutes the seven-color separation technology, which can make us continue to improve the printed samples, making it infinitely close to the RGB color gamut.

To make a multi-color separation ICC Profile, you must have Profile Maker 5.0 or more to make Hexachrome. If you want to make Hi-Fi color, you must also require its Multi-color function to be open.

Hexlmage- in Hexware is a Photoshop Plug-in tool that can decompose RGB, CMYK and Lab files into Hexac hrome CMYK and OG six colors and use the ICC workflow for color separation process. Equinox is a seven-color system. This software uses the unique color operation procedure and the working principle of the ICC Profile to standardize the four-color test target Eci 2002 (including l485 color blocks), and add orange, green and blue colors. A total of 5940 color patch combinations make up the four test targets. Use multiple ICC workflows with different combinations for color separation process to achieve different requirements.

Finally, let's take a look at multi-Color ICISS color separation technology.

ICISS has a strong color separation function. This software is actually a color calculation part of an advanced color separation machine, and its technology is a software that runs on Mac machines.

ICISS can not only handle general Hexachrome or Hi-Fi color, but the most powerful is that any ink can be input into the software as a spot color and a four-color or spot color four-color mixed separation, from two to sixteen colors can be freely combined . Then list the comparison effects of the proofs with different color versions. Hue Mapping in ICISS can set the curve components of different inks and the color of the reduced spectrum according to the ink value. It is very important for color reproduction. If the color reproduction of the input and output is the same, then the color of the ink can restore the color of all spectrums. For the performance beyond the color gamut, CMYKOGB seven-color technology can be used to modify and process the parts that can not be restored.

In addition, the software has another special feature is that two different gray balances can be set on the same picture to separate the neutral gray and color parts; of course, color correction can also be performed, and individual colors can be selected for modification, and can also be used. Different color description files modify different channels, and can also record the modified colors.

Customer requirements that keep pace with the times and technological changes in the ever-changing field are bound to make the original true color printing shine.

The polypropylene composite cap for plastic infusion container comprises of the pull‐tab outer cap, inner cap, and synthetic medical‐level polyisoprene cushion; among which, the materials for the inner cap and outer cap are the imported medical‐level polypropylene, complying with the FDA rules and passing the USP CLASS VI test; the synthetic medical‐level polyisoprene cushion can be made from the imported product on the request of user. The inner cap of the composite cap will contact with liquid medicine directly to ensure the quality; whereas the cushion will be helpful to prevent penetration and seal whilst infusing the liquid medicine, and the outer cap plays a role to prevent bacterium.

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The polypropylene composite cap for plastic infusion container is mainly used for non‐PVC soft‐bag infusion and polypropylene plastic bottle infusion. 

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