You will need
  • - cardboard
  • - box cutter
Take the cardboard and cut out a rectangle equal to the size of the frame in which are inserted the picture and Mat.
Turn over cut sheet and connect the lines to the corners of the cardboard rectangle on the reverse side.
Find the center point at the intersection of these lines, and draw the window off from the outer edge of the rectangle, the width of the passport. Inside this rectangle, draw another rectangle, smaller by 1-2cm
With a sharp knife, cut along the intended diagonal lines from corner to corner more of the inner "window" Mat.
Around the perimeter of the smaller rectangle with a knife cut off the excess cardboard.
Fold the edges of the window Mat to the inside along the lines of a large inner rectangle and smoothen them. Due to this bend, the Central window is obtained by smooth and a little bit of volume because of the double thickness cardboard. This will give a neat and finished appearance to the picture when it is inserted in a frame with Passepartout.
Gather together the picture, Mat and frame, secure the back side with nails or special staples and hang the painting on.
Designed picture frame, Passepartout, and the painting itself must be in harmony with each other. For delicate watercolors or black and white graphics are better suited to a wide Mat of white. For saturated oil paintings, you can do mount dark tint, but it is best to still stick with calm, neutral tones so as not to drown out the image in the picture.
Very original will look different paintings in the same design. In this case, you need to make a passport for all images in the same style similar color shades, combined in proportion to size. Such a composition will always attract the attention of all your guests, and will be very pleased to receive praise and to share the experience.