Lasers can provide a precious tool to conservation process due to their accuracy and the controlled energy they
deliver, especially to fragile organic material such as paper. The current study concerns laser modification such as paper
cleaning, initially of test papers artificially soiled and then of an original book of the early 20th Century. The test objects
were A4 copier paper, newspaper, and paper Whatman No.1056. During the experiments, ink of a pen, pencil and ink
from a stamp was mechanically employed on each paper surface. Laser cleaning was applied using a Q-switched
Nd:YAG operating at 532 nm and CO2 laser at 10.6 μm for various fluences. The experimental results were presented by
using optical microscopy. Eventually, laser cleaning of ink was performed to a book of 1934, by choosing the best
conditions and parameters from cleaning the test samples, like Nd:YAG laser operating at 532 nm.