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The cloth used for upholstery care should not introduce a new mark or obscure what is being removed. Material-specific instructions may therefore specify a white, unprinted cloth rather than any convenient coloured towel or paper.
Updated · NANOLAB Knowledge
Alcantara's care guidance explicitly warns about ink transfer from printed absorbent materials. More broadly, a light cloth makes transferred colour easier to notice, but it does not tell you whether that colour is dirt, dye or another material. Interpret the observation in context and stop if the surface itself appears to be changing.
Illustrative example: a printed paper towel is used on a light upholstery insert and leaves a new mark. The cleaning method has introduced a separate problem. Selecting the specified unprinted material would remove that avoidable variable from the task.
A white cloth is not a universal colourfastness test and does not authorize stronger chemicals. Do not keep rubbing simply because the cloth continues to change colour. Use the exact material's guidance to determine whether the observation requires stopping or a qualified review.
Technical references: Alcantara cleaning instructions. These sources describe their stated methods or products; they do not certify NANOLAB products or establish compatibility with an unlisted surface.
Ask NANOLAB about the exact product and intended use. Use the current product documentation for formulation-specific instructions.