Method for customizing a blank, and the resulting blank

A blank obtainable by a method for customizing a blank of cardboard, corrugated cardboard or the like sheet material, which is delimited by first and second parallel opposite sides and third and fourth opposite sides orthogonal to said first and second parallel opposite sides, so that the blank is foldable into a package suitable for containing at least one item to be to be packaged for shipping, the method comprising:

• doing on a face of the blank a first couple of first and second wave-shaped crease lines and a second couple of third and fourth wave-shaped crease lines, each of said wave-shaped crease lines being crossed by a plurality of straight crease tracts distanced from each other and aligned with corresponding straight crease tracts of the other wave-shaped crease lines and parallel to said first and second parallel opposite sides, so that said third side, said first, second, third and fourth wave-shaped crease lines and fourth side delimit in succession a first top panel, a first side panel, a bottom panel, a second side panel and a second top panel,
• doing in portions of said face of the blank, which are close to the first and second parallel opposite sides, respectively, first and second continuous straight crease lines which are parallel to each other and to said straight crease tracts, and delimit respective back and front wings of each of said first top panel, first side panel, bottom panel, second side panel and second top panel, and
• applying at least one strip of glue, transversally to said straight crease lines on at least a portion of the blank close to said third or fourth side.