Color cosmetics as one of the important fulcrum of cosmetics, its visual effect on cosmetics, touch has a higher demand, relative to other packaging materials, color cosmetics on the cosmetic packaging materials have more stringent requirements of the process.

deviseColor Cosmetic Packaging的外形工藝是一款化妝品面市前的重要的一環(huán)，是不能省略的，目前市面上彩妝包材主要工藝有：Electroplating, silk-screen printing, hot stamping, surface coating, UV, heat transfer, sandblastingTheThen the following you follow the Yu plastic packaging together onCosmetic PackagingThe mainstream processes are analyzed superficially:

I. Plating process

Electroplating process: Electroplating is a surface processing method in which the cations of the metal to be plated are deposited on the surface of the base metal by electrolysis in a salt solution containing the metal to be plated, with the plated base metal as the cathode. The properties of the plating are different from those of the base metal and have new characteristics. Depending on the function of the plating, it is divided into protective plating, decorative plating, and other functional plating.

Plating process: generally includes three stages: pre-treatment before plating, plating and post-plating treatment. Requirements for plating layer:

1, plating and base metal, plating and plating, there should be a good combination.

2, the plating layer should be crystallized carefully, flat, uniform thickness.

3. The plating shall have a specified thickness and as few pores as possible.

4, the coating should have the required indicators, such as brightness, hardness, electrical conductivity.

Second, screen printing process

Screen printing refers to the use of a screen as a plate base, and through the photopolymerization method, a screen printing plate with graphics is made. Screen printing consists of five main elements, screen printing plate, squeegee, ink, printing table and substrate. Screen printing utilizes the basic principle that the graphic portion of the screen printing plate is permeable to ink and the non-graphic portion of the screen printing plate is not permeable to ink. Printing in one end of the screen printing plate poured into the ink, with a squeegee on the screen printing plate ink parts to exert a certain pressure, while moving towards the other end of the screen printing plate at a constant speed, the ink in the movement of the squeegee from the graphic part of the mesh extrusion to the substrate.

Three, hot stamping process

Hot stamping processProcesses include.

Stamping preparation → plate loading → padding → determination of stamping process parameters → test stamping → signing sample → formal stamping.

Stamping is a special printing process that does not use ink. The so-called hot stamping refers to the process of stamping electrified aluminum foil onto the surface of the substrate at a certain temperature and pressure.

Packaging anti-counterfeiting aluminum carbide hot stamping graphics show a strong metallic luster, bright and colorful, never fade. Especially gold and silver aluminum carbide, with its magnificent, exquisite and elegant decoration embellished the surface of the printed matter, enhance the artistry of the printed matter Tangshan Jade Printing, played a prominent theme of the promotional effect; its degree of brightness greatly exceeds the printing of gold and silver, so that the product has the feeling of high-grade and give a person the enjoyment of beauty. At the same time, due to the excellent physical and chemical properties of aluminum carbide, play a role in protecting the printed materials, so the hot stamping process is widely used in high-grade, exquisite packaging and decorative trademarks, calendars and book covers and other printed materials; Secondly, aluminum carbide hot stamping range is very wide range of characters, from the general book covers, trademarks and patterns, publicity and advertising, plastic products to daily necessities, from paper to leather, cotton and so on.

Foil stamping is a dry processing method, the workpiece can be packaged and transported immediately after stamping. Therefore, hot stamping technology is now widely used pre-press process, hot stamping the scope of application is still expanding.

IV. Surface spraying

The four main elements that make up paint include:

1. Resin.

2, pigment (Pigment).

3. Solvent.

4. Other additives (Additive).

There are several types of paint drying as follows:

1. Volatile drying (evaporative drying using thinner).

2. Fusion drying (molecules and molecules polymerize due to volatilization-resistant phase).

3. Oxidative drying (unsaturated fatty acids combined with oxygen in the air).

4、Drying by using bridging reaction (hardening by using bridging agent, so-called hardener, to form a bridge).

5、Ultraviolet hardening (unsaturated polyester class joining agent by ultraviolet wavelength 300-400mn irradiation after molecular polymerization and hardening).

V. Introduction to the UV process:

UV coatings can be applied by dip coating, drenching, lacquer coating, spin coating, or even vacuum coating, and then cured into a film by UV photon irradiation. Compared with general solvent-based coatings, the characteristics of UV coatings are as follows:

1、Fast curing speed;.

2. Curing at room temperature.

3. Saving energy; and

4. Saving floor space; and

5. Does not pollute the environment; and

6. Enhance product performance.

VI. Thermal transfer

Thermal transfer printing is a technique in which patterns or designs are printed onto heat-resistant adhesive paper, and by heating and pressurizing the ink layer, the patterned designs are printed onto the finished material. Even for multi-colored patterns, since the transfer operation is only one process, customers can shorten the pattern printing operation and reduce the loss of materials (finished products) due to printing errors. With heat transfer film printing, multi-color patterns can be created in a single pass without the need for color registration, and realistic patterns can be printed with simple equipment.

Thermal transfer equipment is used to decorate aluminum shapes and all types of metal plates to achieve a wood or marble effect. Thermal transfer equipment is based on the principle of heat sublimation, it can be in 3-5 minutes to the desired wood grain or marble pattern Fast transfer to the aluminum powder coating surface and can penetrate into the coating inside 40-60 microns. Aluminum transfer production process: First, the roll of heat transfer film is cut to the required size using a film machine. Secondly, the cut transfer film is ultrasonically welded into a workpiece package bag with the transfer ultrasonic packaging machine according to the size of the workpiece. Third, the workpiece will be inserted into the workpiece package bag made of transfer film on the packaging platform. Fourth, the workpiece will be wrapped transfer film on the thermal transfer machine trolley platform, in order to put 18 aluminum, aluminum ends connected to the vacuum pump and lock, open the vacuum switch, this time the transfer film is tightly affixed to the aluminum. The trolley automatically sends the aluminum material to the baking oven, which automatically heats up to 220 degrees and keeps the temperature for 3 minutes, and the trolley automatically exits the baking oven. Fifth, release the vacuum pump, remove the workpiece. Sixth, remove the transfer film and check the quality of the workpiece.

Flatbed heat transfer printing production process, firstly, use the film cutting machine to cut the heat transfer paper roll to the required size. Secondly, the thermal transfer paper film is attached to the surface of the workpiece and placed on the flatbed thermal transfer printing machine. Third, push the flat plate to the heating area of the flatbed thermal transfer machine, press the switch of the platen, and the platen will press the thermal transfer paper tightly on the workpiece, heat and keep warm for one minute. Fourth, raise the platen, push the workpiece to the piece section, remove the transfer film to remove the workpiece and check.

Thermal transfer technology is widely used in electrical appliances, daily necessities, building materials and decoration. Because of corrosion resistance, impact resistance, aging resistance, abrasion resistance, fire prevention, outdoor use to maintain 15 years without discoloration and other properties, almost all commodities with this method to produce out of the label. For example, when you open a cell phone case, you can see the label with barcode inside. Many labels require to withstand the test of time, long-term non-deformation, non-fading, not due to contact with solvents on the wear and tear, can not be deformed because of high temperature discoloration, etc., so it is necessary to use a special material printing media and printing materials to ensure that these characteristics, general inkjet, laser printing technology is not achievable.

VII. Sandblasting

The application of sandblasting in metal surface is very common, the principle is to accelerate the abrasive particles to the metal surface impact, and to achieve rust removal, deburring, oxidation layer or surface pretreatment, etc., which can change the surface finish and stress state of the metal surface. Some of the parameters affecting the sandblasting technology need to be paid attention to, such as the type of abrasive, abrasive particle size, spray distance, spray angle and speed, and so on. In addition to sandblasting, shot blasting is also a good choice.

The sandblasting process can be divided into two types: pneumatic gun and impeller blasting, and the advantages of the sandblasting process are that it is able to remove phi peaks, remove burrs after die-casting, stamping, flame cutting and forging, and it is more effective on thin workpieces and burrs with pores, it can clean up residual sand particles from sand casting, clean up rust stains on cast iron or steel, and clean up oxidized skins after heat treatments, burnishing, forging, rolling and other thermal processes. In addition, for coating applications, it removes existing paint or protective coatings, covers defects such as cracks or cold streaks on castings, and provides a glossy surface. Coupled with surface stress, it provides a consistent roughened, oiled and painted surface, and in highly stressed metal parts such as springs and connecting rods, deformation and strengthening occurs when the part is subjected to constant localized hammering. This peening effect requires the use of round abrasives, such as stainless steel shot, in a high-energy shot blasting machine or a specialized power blasting machine. To determine the surface hardening effect of a machine, the test piece can be shot peened or sandblasted and the amount of deformation can be measured to see if it meets the requirements.