Each color has three attributes: hue, lightness and saturation. Hue can be expressed by the wavelength of light waves, that is, different colors reflect different wavelengths. Lightness indicates the lightness and darkness of the color, and the lightness of the ink indicates how much light the ink reflects. Saturation refers to the purity of a color. If an object has a high reflectivity for light in a certain band of the spectrum, and a low or no reflectivity for light in other bands, the purity of the color is high.
The pigment of iron printing ink usually accounts for 10% to 35% of the ink composition. The amount of pigment determines the concentration of the ink and also has a great influence on the relative density, transparency, heat resistance and light resistance of the ink. In the ink color matching process, the ink should be selected according to factors such as the iron printing process, the thickness of the ink layer, and the nature of the print. At the same time, the gloss, hue, tinting power, hiding power and other properties of the ink itself must be considered.
Gloss: refers to the ability of the ink to reflect light in the same direction under the influence of light after printing. It directly affects the appearance of the printed product. It can be measured with a gloss meter or judged by the naked eye.
Hue: It is the basic characteristic of color. The color matcher must first consider whether the hue is consistent. The detection method is: by scraping the color of the sample paper or simulating the iron printing method, compare the standard sample and the sample with the naked eye, and observe whether the hue is consistent.
Hiding power: refers to the ability of ink to cover the background color. The better the hiding power, the lower its transparency. The level of transparency directly affects the efficiency of ink color registration and the degree of influence of printed parts.
Coloring power: used to indicate the concentration of ink. The measuring method is as follows: after adding a certain amount of standard white ink to a certain amount of ink to dilute and mix it, it is compared with the standard sample. The color strength reflects the relationship between the degree of ink color mixing and the thickness of the ink film.
The gloss, hue, and hiding power can be identified by the scraping test of the scraped paper. The specific operations are as follows: put standard ink in the upper left corner of the scraped paper and color matching ink in the upper right corner, so that the standard scraper and the scraped paper are flattened at a perpendicular angle. For thin compresses, gently spread the thick compresses at an oblique angle. After the ink surface is dried, observe the hue of the ink in the thin part, observe the gloss difference between the two inks in the thick part, and identify the ink hiding power (transparency) in the black band (solid) part. Normally, black or color inks use white scraped paper, and white inks use black scraped paper. Observation of color samples is carried out under indirect indoor light sources during the day and under standard light sources at night.
Matters needing attention in printing iron ink color matching
Avoid using too much colored ink. Because the more ink, the farther away from the standard color, the worse the brightness, the worse the gloss of the mixed color. At the same time, it is necessary to choose the same brand of ink to avoid the disadvantages of color escape and reduced transfer performance caused by the mixing of different manufacturers and different brands of ink in the production of printing iron.
The preparation of primary color ink is divided into three types: single color, intermediate color and multi-color. Monochrome refers to the blending of one primary color ink; intermediate color is blended with two primary color inks; polychromatic color is blended with 3 primary color inks. Any ink prepared by adding a diluent is called a light-colored ink, and the following 3 points should be noted when blending: no whitening agent is needed for white ink; white ink is the main color when toning, and color ink is added in an appropriate amount; The judgment is accurate.
Special color inks include gold / silver ink, pearlescent ink, luminous ink, etc. The gold / silver ink should be used in time after opening the can, otherwise it is easy to oxidize and darken. Commonly used gold ink has three kinds of green gold, gold and red gold, the color is mainly gold powder, supplemented by color ink adjustment. There are also many types of silver ink. If a small amount of white ink is added, it will be silvery white, and if a small amount of yellow ink is added, it will be silvery yellow. Pearlescent ink is composed of pearlescent pigments and gloss-adjusting ink oil. Luminous ink is composed of phosphorescent pigment and color ink, which has the effect of glowing at night.
Tinplate is divided into bright side and dark side according to the thickness of the coating and the surface processing technology. For example, color inks with high transparency can choose tinplate stamps with good brightness to enhance the metallic luster of the ink; while tinplate with dark or rough surfaces can choose color inks with strong hiding power, such as white ink, to increase their adhesion strength.
A training chair is a seat designed specifically for activities such as training and meetings. It has the characteristics of comfort, durability, and ease of movement, which can meet the needs of different groups of people. Training chairs can be classified into various categories based on material, structure, function, and other aspects. Below will be a brief introduction to the classification of training chairs.
1. Material classification
The materials of the training chair mainly include metal, plastic, and fabric. Metal training chairs typically have strong stability and durability, making them suitable for long-term meetings or training activities. The training chair made of plastic material has the characteristics of lightweight and easy to clean, making it easy to arrange the meeting site at any time and suitable for use in multifunctional halls and other places. The training chair made of fabric has a comfortable sitting experience and good breathability, making it suitable for long-term meetings or training activities.
2. Structural classification
The structure of training chairs mainly includes single chairs, linked chairs, and foldable chairs. Single chairs are the most common training chairs, with each seat being independent and adjustable as needed. Chainage refers to the connection of multiple seats together, usually in the form of one or more rows, suitable for use in large training venues. Stackable chairs are training chairs that can be folded and stacked, saving space and facilitating storage and handling.
3. Functional classification
The main functions of the training chair are adjustable, rotatable, foldable, and storable. The adjustable training chair can adjust the height and angle according to personal needs, providing a more comfortable sitting posture. The rotatable training chair can rotate 360 degrees, facilitating communication and interaction with people around it. The foldable training chair can be conveniently stored and transported, making it suitable for use in multifunctional halls and other places. The training chair that can store items is designed with storage space below or behind the chair, making it convenient to store items such as stationery and documents.
In summary, the classification of training chairs mainly includes material classification, structural classification, functional classification, etc. Choosing a suitable training chair can provide a better user experience and improve the effectiveness of training and meetings.
Meeting Chair,,Foldable Chair,Customized Chair
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