Pre-assembled canvas for painting or printing

A pre-assembled canvas for painting or printing which allows flat storage and transportation, it is easy to assemble and has supports with different thicknesses, comprising:

• a foldable supporting structure comprising a central panel having a quadrangular shape;
• four side panels forming a perimeter around the central panel;
• and four rear panels interlocked to each of the side panels, said rear panels are rectangular with smaller sides having through holes adjacent to each of said smaller sides, said panels are separated by “V” longitudinal grooves with angle between 900 and 1000 which allows perpendicular folding of each of the panels to form a frame having a thickness;
• a flexible layered painting or printing substrate comprising a front face and a rear face having a quadrangular shape with square cuts at each vertex, the sides of the square cuts matching the width of the side panels plus the width of the rear panels,
• wherein the substrate is attached to the foldable supporting structure by using staples on the rear panels, so that a perimeter is formed on said rear panels once the foldable supporting structure is folded;
• the canvas having fastening means attached to the rear panels, said fastening means corresponding to triangle-shaped pieces located under each corner on the rear panels when the foldable supporting structure is folded, said triangle-shaped pieces having two through holes having axes that match axes of the through holes of the rear panels in each corner formed when the foldable supporting structure is folded;
• and the triangle-shaped pieces are fixed to the rear panels by snap-on connectors that are inserted in the through holes of the rear panels and the through holes of the triangle-shaped pieces forming a splicing among the rear panels.