The principle of different colors on carbonless copy paper

Carbon free copy paper shows different colors, mainly carbon free copy paper is a kind of hidden color copy paper, which has the function of direct copying and direct color rendering. Its color development is mainly: under the action of external force, the force sensitive pigment and oil solution in the microcapsule overflow, and after contacting with the chromogenic agent, dyeing reaction occurs, thus playing the role of copying.

Generally, there are two kinds of coating in carbonless copy paper: CF layer containing chromogenic agent and CB layer containing chromogenic agent. Chromogenic agent is a special colorless dye, which has been dissolved in non-volatile carrier oil and encapsulated in 3-7 μ m microcapsules. Under the impact pressure of hard writing and printing, the microcapsule can be crushed, and the colorless dye solution will flow out and contact with the color developing agent, and the chemical reaction will take place, so as to achieve the purpose of copying.

Carbon free carbon copy paper is characterized by clear and distinct copy writing, no fading, and can prevent alteration and imitation. It does not pollute fingers, clothes and other stationery paper. It has various colors and is easy to identify and handle. According to the color of paper, there are five kinds: red, yellow, green, blue and white. According to the color trace, it can be divided into blue, yellow, orange, black, red and other colors. Generally, it is mainly used for multiple forms, bills, continuous bills, business bills, etc.

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