The plaster of the different quadrants of the support and the strips of reinforcing canvas, disintegrated and with many cracks, no longer make any effort to maintain the support tensed. So it was decided to reinforce it and the canvas was prepared to make the 72 quadrants (of 22 x 26 cm each) and 154 new reinforcements. This operation provides stability and rigidity to the painting, and makes the whole rest equally and thus avoids tensions. With a vacuum cleaner and a small trowel all the disintegrated plaster from the back was removed. With reduced animal glue and whiting the prepared fabrics are bathed in the form of a quadrant and were applied to each grid of the back of the support. When the plaster was set, the piece was raised so as to ensure a homogeneous drying and tension.