Introduction: With the rapid development of cosmetic packaging industry, consumers have higher and higher visual requirements for product packaging. Glass frosted bottles are favored by many cosmetic packaging manufacturers and consumers due to their noble and elegant appearance and touch, and become one of the main materials for product managers in cosmetic application.
Frosted craft
Chemical frosted glass is essentially a kind of acid-corroded glass with rough surface, which is similar to the principles of chemical etching and chemical polishing. It uses the chemical corrosion effect of acid on the glass surface.
The difference is that chemical polishing does not make acid and some insoluble reactants produced after chemical corrosion of glass adhere to the surface of glass, and tries to dissolve and wash it out. The process of chemical polishing is always the process of uniform erosion of the whole surface, thus obtaining a transparent and smooth surface; While chemical sand does not remove the insoluble substances of chemical reaction, and adheres to the surface of glass, as the reaction time continues, reactants accumulate into granular crystals and firmly adhere to the surface. The surface with reactant adhesion hinders the further reaction of acid erosion, that is, it becomes non-uniform erosion, and the semi-transparent wool surface is obtained. The wool is scattered to the incident light, showing a semi-transparent state and hazy feeling, so it is called frosted.
Characteristics of frosted
Frosted sand belongs to the process of chemical erosion, and the generated insoluble reactant becomes a small particle crystal which is firmly attached to the glass surface. The contact degree betweenthe particle and the glass surface in the particle gap is different, and the erosion degree is also different, which makes the surface uneven and belongs to surface chemical treatment.Chemical frosted can obtain rough or delicate wool surface by controlling the size and quantity of crystals attached to the glass surface.
Judgment of sand degree
1.Scattering rate
The higher the scattering rate of the glass surface, the higher the degree of sand covered by the glass.
2. Total pass rate
In addition to scattering, reflection and absorption of incident light, glass is also transmitted, while the absorption rate of colorless glass to visible light is relatively small, and the thickness of colorless transparent glass of the same variety and composition is also the same, and the total transmittance under visible light is almost the same before being covered with sand. Therefore, the total transmittance can be used to approximate the size of the glass scattering rate, that is, the lower the total transmittance, the greater the degree.
3. Surface topography
It mainly refers to the size and distribution of corrosion products on the glass surface after acid corrosion, which not only affects the total transmittance, but also affects the fineness of the outer surface. If the distribution of erosion product particles on the attached surface is sparse, the total transmittance is higher. If the distribution of erosion product particles is compact, the total transmittance is lower.
Frosted method
1.Immersed method
Immerse glass products in sand solution for a certain period of time
2. Blowing method
Blow the frosted liquid onto the glass surface
3. Coating method
Apply sand paste on the surface of glass products
The difference between sandblasting glass and frosted glass
Sandblasting glass
It is to hit the glass surface with the glass sand particles emitted by spraying at high speed, forming a kind of subtle concave and convex on the glass surface, producing a hazy effect so as to achieve the effect of refraction of light. The finer the glass sand is, the finer the particles are, the higher the three-dimensional effect is. Compared with Frosted, the surface of glass products with sand blasting process feels rough,High breakage rate, large dust contamination, and general process difficulty.
Frosted glass
After ordinary glass bottles are covered with sand powder, they are covered with sand glass bottles. The production process of corroding its surface by soaking with chemical agents mainly cooperates with screen printing and can be painted on the glass surface.
Application of frosted glass
The cosmetic packaging industry adopts sand bottle as the main material of the cosmetic packaging market, which is favored by the majority of cosmetic consumers for its noble and elegant appearance.However, the surface of the frosted glass is extremely tiny frosted particles, which feels delicate and gives off a beautiful jade-like luster on the surface of the bottle body. Moreover, the stable characteristic of glass itself effectively prevents the chemical reaction between cosmetics and cosmetic bottles under the irradiation of light, etc. to better ensure the quality of cosmetics.
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Post time: Nov-08-2023