Glass bead blasting

Precise deformation of the surface

Specifications of glass bead blasting

  • Strict Swedish quality standards
  • Optimal improvement of product mechanical properties
  • Extremely suitable for stainless steel (Stainless steel or stainless steel)
  • Perfect for food and cosmetic industrial products
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glass bead blasting at Kalfsvel!

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We use glass beads in sizes 40 – 70 µm and 100 – 200 µm

Glass bead blasting (micropeenen) is a processing technique in which an object is blasted with fine glass beads (glass beads). This improves the mechanical properties. On the other hand, if broken glass grains are used, the surface will be cleaned of dirt and roughened up. In that case the processing is the same as for steel blasting (shot blasting or sand blasting). Glass is used instead of grit. It is therefore very important not to use broken glass beads for glass bead blasting to improve the surface.

The process

Improving mechanical properties (glass bead blasting)

After the object has been cleaned of contaminants, glass balls of 40 – 70 µm and 100 – 200 µm are fired at the surface using relatively low pressure compressed air.

This creates a cold deformation (reinforcement) in the surface, making it smoother and harder. This also increases the resistance to various types of corrosion, such as stress corrosion and corrosion fatigue.


Characteristic of the glass bead blasting is that it reduces the roughness of the surface. The height of the tops and the depth of the valleys remain approximately the same after blasting. However, the surface is smoother and less dirt will adhere to it. Compared to a mechanically polished surface, the roughness appears to be greater on a macro scale. However, on a micro scale, the roughness is comparable to a polished surface and this is important for good adhesion.


Variants of glass bead blasting

  • Glass jets. Here the surface is blasted with broken glass grains. These have sharp edges, so that the object is cleaned with abrasion (wear away by mechanical movement such as friction or scraping). By blasting the object with broken glass grains at an angle of about 45 degrees, the contaminants are removed from the surface. The broken glass grains have sharp fracture surfaces that scrape across the surface and thus remove the contaminants. (Not performed at Kalfsvel Coating).
  • Glass bead blasting. The object is blasted with pure round glass grains. This improves the mechanical properties of the object.
  • Grid or steel blasting. Blasting with grit, corundum or steel grains.
  • Ceramic beads. Ceramic beads are used instead of glass beads. (Not performed at Kalfsvel Coating).
  • Micro clean. The surface is hit at an angle of 45 degrees to expel the contaminants from the surface. (Not performed at Kalfsvel Coating).
  • Shot carrots. The surface is blasted with a shot (hail, metal, glass pellets, stainless steel, etc.) at an angle of 90 degrees (perpendicular to the surface) to improve the properties of the surface. (Not performed at Kalfsvel Coating).
  • Satin. Make the surface glossy. (Not performed at Kalfsvel Coating).

Application and benefit

Glass beads or glass bead blasting can be applied as a pre-treatment to the coating of almost all non-ferrous materials. For stainless steel and aluminium, it is often the final operation. It is often used with cylinders, valves and in the process industry. Glass bead blasting is a relatively inexpensive and easy-to-use process.

Curious about what Kalfsvel Coating can do for you or do you still have questions after reading this information? Contact us without obligation. We are happy to talk to you personally or gladly answer your e-mail. 0031 (0) 75 6174355 or

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