80% of Cosmetic Bottles are Using Painting Decoration

Spray painting is one of the most frequently used surface decorating processes.

What is Spray Painting? 

Spraying is a coating method in which spray guns or disc atomizers are dispersed into uniform and fine mist droplets by means of pressure or centrifugal force and applied to the surface of the object to be coated.

The Role of Spray Painting?

1. Decorative effect. Various colors can be obtained on the surface of the object by spraying, which increases the ornamental quality of the product.
2. Protective effect. Protect metal, plastic, wood, etc. from being eroded by external conditions such as light, water, air, etc., and prolong the service life of the items.

What are The Classifications of Spray Painting?

Spraying can be divided into manual spraying and fully automatic spraying according to the automation method; according to the classification, it can be roughly divided into air spraying, airless spraying and electrostatic spraying.

01 Air Spraying                             

Air spraying is a commonly used method in which the paint is sprayed by atomizing the paint with clean and dry compressed air.
The advantages of air spraying are easy operation and high coating efficiency, and it is suitable for coating objects of various materials, shapes and sizes, such as machinery, chemicals, ships, vehicles, electrical appliances, instruments, toys, paper, clocks, musical instruments, etc. .

02 High Pressure Airless Spraying

High-pressure airless spraying is also called airless spraying. It pressurizes the paint through a pressure pump to form high-pressure paint, sprays out the muzzle to form an atomized airflow, and acts on the surface of the object.

Compared with air spraying, airless spraying has high efficiency, which is 3 times that of air spraying, and is suitable for spraying large workpieces and large-area workpieces; since the spray of airless spraying does not contain compressed air, it avoids some Impurities get into the coating film, therefore, the overall spray effect is better.

However, airless spraying has high requirements for equipment and a large investment in equipment. It is not suitable for some small workpieces, because the loss of paint caused by spraying is much greater than that of air spraying.

03 Electrostatic Spraying              
Electrostatic spraying is based on the physical phenomenon of electrophoresis. The grounded workpiece is used as the anode, and the paint atomizer is used as the cathode and connected to a negative high voltage (60-100KV). A high-voltage electrostatic field will be generated between the two electrodes, and a corona discharge will be generated on the cathode.

When the paint is atomized and sprayed in a certain way, it enters the strong electric field at high speed so that the paint particles are negatively charged, and flow directionally to the surface of the positively charged workpiece, evenly adhering to form a firm film.

The utilization rate of electrostatic spraying is high, because the paint particles will move along the direction of the electric field line, which improves the utilization rate of the paint as a whole.

What are The Sprayed Paints?

According to different dimensions such as product form, use, color, and construction method, coatings can be classified in multiple ways. Today I will focus on two classification methods:

Water-based Paint VS Oil-based Paint

All paints that use water as a solvent or as a dispersion medium can be called water-based paints. Water-based paints are non-flammable, non-explosive, odorless, and more environmentally friendly.

Oil-based paint is a type of paint with dry oil as the main film-forming substance. Oil-based paint has a strong pungent smell, and some harmful substances are contained in the volatile gas.

In the context of stricter environmental protection, water-based paints are gradually replacing oil-based paints and becoming the main force in cosmetic spray paints.

UV Curing Coatings vs Thermosetting Coatings

UV is the abbreviation of ultraviolet light, and the coating cured after ultraviolet radiation becomes UV curing coating. Compared with traditional thermosetting coatings, UV-curing coatings dry quickly without heating and drying, which greatly improves production efficiency and saves energy.

Spraying is widely used in the cosmetics industry and is one of the most important coloring processes. 80% of various cosmetic bottles in the cosmetics industry, such as glass bottles, plastic bottles, lipstick tubes, mascara tubes and other products, can be colored by spraying.