Sandblasting is a process that utilizes compressed air as the driving force to push an abrasive material onto the surface of a workpiece for treatment. This is known as sandblasting, which is often referred to as shot peening. Because sand was the only abrasive available in the early days of shot blasting, shot blasting was known then and for a long time thereafter as sandblasting. Sandblasting gives the surface to be cleaned the desired cleanliness and a certain roughness, and improves the adhesion of the coating to the underlying surface. No matter how good the coating is, it will not adhere to the surface of the workpiece without a long period of surface preparation. The purpose of surface preparation is to clean the surface and create the roughness needed to "lock" the coating to the surface. When a good industrial coating is applied to the surface of a blasted workpiece, the service life of the coating is 3.5 times longer than the service life of a coating of the same quality on a surface treated by other methods. Another advantage of abrasive blasting (shot peening) is that the surface roughness can be pre-determined according to the requirements and can be realized during the cleaning process.

Frosting is for exampleCosmetic glass bottleThe process by which smoothness becomes unsmooth and light striking the surface creates a diffuse reflection. In chemical frosting, glass is mechanically or manually ground with emery, silica sand, pomegranate powder, and other abrasives to create a uniformly rough surface, or glass and other objects may be treated with a hydrofluoric acid solution to create frosted glass.

Both frosting and sandblasting are used to cover the surface of the glass so that the light passing through the shade creates a relatively even scattering. It can be difficult for the average user to distinguish between the two techniques. The following describes how each technique is manufactured and how to recognize them.

1. Scrubbing process

Frosting refers to immersing the glass in a prepared acidic liquid (or applying an acidic paste), corroding the surface of the glass with a strong acid, and the ammonia hydrogen fluoride in the strong acid solution causes crystals to form on the surface of the glass. As a result, if the frosting process is done properly, the surface of the frosted glass is very smooth, and the crystals formed by scattering produce a hazy effect. If the surface is relatively rough, this is an indication that the acid is severely attacking the glass, or that some of them are still free of crystals. The process is characterized by the appearance of shiny crystals on the surface of glass formed under critical conditions. The main reason for this is that the ammonia fluoride has reached the point where it is almost consumed. Many attempts and studies have been made by many manufacturers to achieve this state, but none have been able to overcome this difficulty.

2. Sandblasting technology

It utilizes the sand particles sprayed out of the gun at high speed to hit the glass surface, forming a fine concave and convex surface, thus achieving the effect of scattering light and forming a hazy feeling when the light passes through. The surface of glass products produced by sandblasting process is rough to the touch. As the glass surface is damaged, it looks like white glass in terms of the photosensitivity of the original transparent glass.

These two processes are completely different. Frosted glass is more expensive than sandblasted glass and the results depend largely on the user's needs. Some unique glass is not suitable for frosting. From the point of view of noble pursuits, one should go for frosted. The sandblasting process can be done in a general factory, but frosting is not easy to do well.