It's supposed to last for many years, but if the ink that we use has been absorbed with oxygen and moisture [which] are not being removed, then we can quickly see dark spots appear in the pixels.
Devem durar muitos anos mas, se a tinta que usarmos, for absorvida pelo oxigénio e humidade, que não forem eliminados, vemos aparecer, rapidamente, manchas negras no meio dos píxeis.