Which step in the glass preparation process is not required for all parts?

In the glass preparation process, "Aktivating" is the step that is not required for all parts. Aktivating generally refers to the use of a specific chemical treatment to enhance the adhesion properties of certain materials. This step is particularly important for certain applications or when dealing with specific substrates, but it is not universally applicable to all parts involved in glass installation.

The other steps, such as decontaminating, final washing, and scuffing, are essential for ensuring the surface is clean and prepared for the adhesive to bond effectively. For instance, decontaminating ensures that any dirt, dust, or residues are removed, while final washing helps to eliminate any remaining contaminants. Scuffing is often necessary to create a rougher surface that can promote adhesion. Since Aktivating is more specialized and not universally needed for every scenario, it is the correct choice in this context.