The filament template can be mounted next to the 3D printer. The samples are then strung onto cable ties. It enables a clear arrangement of filaments and easy selection of the desired filament. Individual samples have a large text on them with a second plastic.
On the other side of the card, I recommend writing the manufacturer and additional information about the given sample.
To produce a specific text, I am attaching an empty sample and the Ubuntu font below. The font must be installed on the computer.
Ubuntu font - font on sign
Created in FreeCAD