Income accruing to national central banks in the performance of the Eurosystem's monetary policy function. It derives from the assets held on its balance sheet as a balancing entry against banknotes in circulation and credit institution margin deposits. The monetary income obtained by each national central bank, referred to as "seignorage income", is pooled and redistributed among these at each year-end, in accordance with their share in the ECB's paid-up capital.
The effect produced by regular reticular images placed on top of each other. If the original image contains linear images with interlinear frequency in the order of line frequency of the screen applied, a moiré effect will appear. Readers, including colour photocopiers, read the image that they have to copy with miniscule photoelectric cells. If the original image contains linear structures with the same interlinear frequency as the photoelectric cells, the copy will also show a moiré structure.