Color Screen Printing Correlation Modeling Of The 25 Steps (1) - Color Printing, Screen Printing -

The relevance of color screen-printing model includes 25 steps and related variables

. These steps are only organized into the correct order, to ensure correct results. Along the path every step of the flowchart, you will find each of the steps and variables to be addressed is how the events of the previous relationship and how it affects the back steps. By understanding these relationships, you need to avoid missing steps.

Step 1: Specify the original In the first step, to avoid the mistake of substrates and inks relationships. Substrates must be able to ink absorption and maintain the stability of ink, so print substrates prior to the study of various characteristics, such as polarity, wrinkles, smoothness, stability and surface tension, after India and so on. The late consequences of drying or curing must be within acceptable range. Parameter index substrates are usually in the customer's requirements are illustrated, can be identified in this analysis.

Step 2: Select Ink If the client specifies the type of substrate, you must decide what kind of ink and the substrate affinity is best to evaluate its characteristics and curing capabilities. This process relates to the operation of the whole process. Ink characteristics and the decision whether the match with the substrate is the best way through "index analysis" to determine the indicator from the ink supplier, is the standard interpretation of QC specification parameters come, QC specification parameters to ensure the production of commercial products characteristics and volume of product quality consistency and developed.

An ink analysis of indicators should include four characteristics:

1. Optical indicator: if the main color of the wavelength, L * a * b * color values and Yxy, spectrum sensing curve, whiteness, gloss and density;

2. Rheological indicators: for example plastic, and the relative viscosity, thixotropy index, yield value, ink silk short degree, fake plastic / thixotropy describes viscous viscous and thermal stability of the level;

3. Curing indicators: including setting speed and energy standards (for UV inks Including the recommendation for the amount of wattage, maximum performance and light absorption characteristics).

4. Physical properties: specific viscosity of the abrasive under, specific weight, adhesion, abrasion resistance, flexibility, surface tension, curing the critical surface tension, critical pigment volume.

Step 3: Set the standard for the curing equipment

Your reactor or dryer to provide the best capacity. Lowest level during the curing properties of the following, ink will show poor adhesion and gloss; above the maximum level of the ink film will be over-hardened, easy to dry, easy to deform.

You must pass at different conditions of temperature and velocity measurement results, the establishment of a standard light source operating parameters, and tolerance. With UV ink, you must define the standard wattage, usage, light standard.

Assessment through actual print abrasion resistance, adhesion, gloss, and flexibility. You also need to analyze bleaching and climate stability, and critical surface tension.

Step 4: Set the initial color level

Once you've created the ink / substrate matching relations, and established a system of curing standards on for color settings. Situation requires the establishment of the first color measuring three attributes: brightness, saturation and density.

Brightness wedge used to establish the density range of magenta ink, magenta first to be standardized because it is in most of the substrate surface, showing high contrast, but also because the human eye the changes of the product is sensitive to red light. In the case of lack of pigment, white substrates caused a disproportionate increase of magenta density.

Saturation wedge is another to establish the best level of magenta density factor, which combined with the light wedge, given the magenta ink minimum and maximum density range. The same approach also applies to the other two primary colors?? Green and yellow.

Notes: magenta saturation start low, because the object's surface brightness is high. With the increase in intensity surface is covered, but eventually reached the limits of ink, to reach the highest point of saturation. Start a high brightness, because the highest surface brightness white, with the increase in ink, it began to decrease until the level limit. Magenta density is the best area range between these two limits.

Step 5: Set the level of spectral gloss

By measuring gloss, you can set criteria to quickly evaluate a number of glossy ink relative status. Photometer issued with their own light, and test the amount of light reflection surface compared to that measured in percentage ratio. The higher the percentage, the higher the gloss level.

Ink layer of the uniform will seriously affect the measurements, which provide valuable representation issues, such as surface defects, wrinkles and poor ink transfer. Gloss by setting an acceptable standard, you can easily identify them.

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