Non-destructive methods to study a painting belonging to the French painter Deschamps Jean Pascal carried out using scanning electron microscope (SEM.), X-Ray diffraction (XRD), infrared analysis method, gas chromatography, optical light microscopy (OLM) and micro chemical analysis. The French painter Deschamps Jean Pascal was born in Paris at the beginning of the 20^th century. He was a member of the French Artist Salon. He exposed his paintings in this Salon prior to 1939. Materials and reconstruction of this painting have been studied. The size of the painting is 269x 360 mm. The support is made of straw paper board, and alla prima technique is used. The artist's work is monochrome in tone. Raw umber, Venetian red, cerulean blue, zinc white are the main pigments in the painting. The oil painting losses its artistic image, i.e. the darkened varnish, the two lacunas, and the acidified strawboard which is very brittle. The conservation treatment used suitable materials and methods. A new method was used to protect the board of the painting from high relative humidity or even from the water making it waterproof. The experimental study was made to confirm that this material is a appropriate one for this subject.