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G 9.2.3 Color shade differences
The appearance and color shade of virtually every paint finish undergo changes, depending on its age, amount of wear-and-tear and maintenance.
This is immediately apparent from the obligatory color shade comparison using a spray plate. Consequently, a correct repair-painting procedure may also
include a color shade comparison through re-tinting, touching up and polishing the old paintwork (-> G 4.2.6 "Painting procedure information"). In
certain cases, the more economical method is to touch up the paint finish, rather than adding a new nuance.
If you decide to re-tint the repair paint, the mixture formula of the color shade in question serves as a tinting aid.
The application method also changes the appearance and color shade of a paint finish. This means that the appearance and color shade of a paint finish
depend on:
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The nozzle settings of the spray gun and the spray pressure ( -> G 9.2.3.1)
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The amount of thinner used and the spray viscosity ( -> G 9.2.3.2)
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The spray method used ( -> G 9.2.3.3)
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The distance between the spray gun and the object to be painted ( -> G 9.2.3.4)
This is a source reference. Confirm exact model applicability in the original material.