Pre-assembled canvas for painting or printing

1. 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.

2. The pre-assembled canvas for painting or printing according to claim 1 , wherein the central panel of the folding supporting structure has a front face, a rear face, and four edges with a bevel between 45° and 50°, where the central panel is a rear support of the painting or printing layered substrate for.

3. The pre-assembled canvas for painting or printing according to claim 1 , wherein the central panel of the folding supporting structure has a front face, a rear face, and four edges; wherein the side panels are interlocked to each of the four edges of the central panel, are rectangular and make up the thickness of the frame, where each of the four edges has a bevel between 45° and 50°.

4. The pre-assembled canvas for painting or printing according to claim 1 , wherein said smaller sides of said rear panels are cut at an angle between 45° and 50° and wherein edges of the rear panels have a bevel between 45° and 50°, wherein the said rear panels form a rear edge of the foldable supporting structure.

5. The pre-assembled canvas for painting or printing according to claim 1 , wherein the snap-on connectors are pins.

6. The pre-assembled canvas for painting or printing according to claim 1 , wherein said substrate is synthetic or natural fabric used as a base for painting or digital printing.

7. The pre-assembled canvas for painting or printing according to claim 1 , wherein said substrate is cellulose or synthetic based film with a printing.

8. The pre-assembled canvas for painting or printing according to claim 1 , wherein the central panel, the side panels, and the rear panels of the foldable supporting structure are made of a material selected from the group consisting of chipboard, plywood, plastic, cardboard, and a layered plate of molded expanded polystyrene.

9. The pre-assembled canvas for painting or printing according to claim 1 , wherein the substrate has the same width and length of the foldable supporting structure.