SPRAY | SCAN | DONE

Even with state-of-the-art scanners, it is necessary to apply matting spray in several application cases:

a) Transparent parts
As we are dealing with optical technologies, light needs to be reflected off the surface back into the sensor of the scanner. In case of a transparent surface, however, the light will go through the surface instead of being reflected by the same. In consequence, the scanner is not able to capture the surface structure.

b) Reflective parts
In case of reflective parts, such as a mirror, the light beams will be reflected in a focused way instead of in a diffused way. This means that the chance of a beam hitting the reflector of the scanner is greatly reduced and the scanner will only capture a fraction of the reflected light beams.

c) Deep Pocket
When the object to be scanned has deep pockets, the scanner receives a reflection from the walls of the pocket onto the bottom. This causes disturbance in the pattern of the light manifesting in the scan as “artefacts” or bad data.

d) High quality and accuracy
When quality and accuracy are important, you might want to apply spray to remove as much as possible all the causes like colour differences, differences in reflection, texture, etc.
The use of spray creates a matt, white coat reducing reflection and other inhomogeneities and thus provides perfect scanning condition.

In general, matting sprays used in 3D metrology for antireflective coating can be classified into the following two product groups:

Permenent sprays

• surface remains white after scan
• cleaning required or disposal of scanned object

Vanishing sprays

• coating evaporates automatically
• no cleaning after scanning required
• no pigment-contamination of laboratories, sensors, environments, scanners and users

AESUB white - value proposition

AESUB white is a permanent scanning spray developed by scanning experts. It is the result of consistent further development of permanent scanning sprays.
The spray applies a homogeneous, thin matting layer onto the surface of the object. It is developed for optimal contrast values in optical scanning applications. AESUB white contains pigments, propellant and solvent and has been optimized with regards to material compatibility. AESUB white sets new standards by optimizing the surface's homogeneity and reducing layer thickness.
Unlike traditional sprays, AESUB white is free of titanium dioxide, associated with cancerogenic incidents through inhalation by the European Chemicals Agency.

AESUB white characteristics are:

• optimal contrast values
• average layer thickness of ~7 μm
• consistent and homogenous coating
• optimized material compatibility
• free of titanium dioxide (TiO2)
• excellent scannability