A laminar blank for forming a container for consumer articles, the laminar blank comprising: a bottom wall panel for forming a bottom wall of the container and a top wall panel for forming a top wall of the container; a rear wall panel for forming at least a part of a rear wall of the container and a front wall panel for forming at least a part of a front wall of the container; two first side panels extending from the rear wall panel and two second side panels extending from the front wall panel, such that, when the container is assembled from the laminar blank, the first and the second side panels overlap to form at least part of left and right side walls of the container; wherein at least one of the first side panels, at least one of the second side panels, or at least one of the first side panels and at least one of the second side panels is connected to a respective rear wall panel or the front wall panel by a modified edge portion (3100, 3110, 3120, 3130); each modified edge portion comprising: a first zone (3100a, 3110a, 3120a, 3130a) comprising a plurality of creasing lines extending substantially in the longitudinal direction of the modified edge portion; and a second zone (3100b, 3110b, 3120b, 3130b) that is substantially free of creasing lines, the second zone being disposed between a first free edge of the modified edge portion and the first zone of the modified edge portion; the laminar blank further comprising at least one pair of dust flaps extending from the first side panels or the second side panels or both, such that, when the container is assembled from the laminar blank, the flaps in a pair overlap the bottom wall panel to form the bottom wall or the top wall panel to form the top wall; wherein each dust flap in the at least one pair of dust flaps comprises a main flap portion depending along a fold line from a respective first or second side panel and a side flap portion extending laterally from the flap main portion beyond a peripheral edge of the respective first or second side panel; and wherein the first zone (3100a, 3110a, 3120a, 3130a) of each modified edge portion comprises a plurality of pairs of creasing lines, all the creasing lines extending in parallel in the longitudinal direction of the curved edge portion, wherein the distance between two creasing lines in each pair as measured along the width of the modified edge portion is less than the distance between two adjacent pairs of creasing lines as measured along the width of the modified edge portion. a bottom wall panel for forming a bottom wall of the container and a top wall panel for forming a top wall of the container; a rear wall panel for forming at least a part of a rear wall of the container and a front wall panel for forming at least a part of a front wall of the container; two first side panels extending from the rear wall panel and two second side panels extending from the front wall panel, such that, when the container is assembled from the laminar blank, the first and the second side panels overlap to form at least part of left and right side walls of the container; wherein at least one of the first side panels, at least one of the second side panels, or at least one of the first side panels and at least one of the second side panels is connected to a respective rear wall panel or the front wall panel by a modified edge portion (3100, 3110, 3120, 3130); each modified edge portion comprising: a first zone (3100a, 3110a, 3120a, 3130a) comprising a plurality of creasing lines extending substantially in the longitudinal direction of the modified edge portion; and a second zone (3100b, 3110b, 3120b, 3130b) that is substantially free of creasing lines, the second zone being disposed between a first free edge of the modified edge portion and the first zone of the modified edge portion; a first zone (3100a, 3110a, 3120a, 3130a) comprising a plurality of creasing lines extending substantially in the longitudinal direction of the modified edge portion; and a second zone (3100b, 3110b, 3120b, 3130b) that is substantially free of creasing lines, the second zone being disposed between a first free edge of the modified edge portion and the first zone of the modified edge portion; the laminar blank further comprising at least one pair of dust flaps extending from the first side panels or the second side panels or both, such that, when the container is assembled from the laminar blank, the flaps in a pair overlap the bottom wall panel to form the bottom wall or the top wall panel to form the top wall; wherein each dust flap in the at least one pair of dust flaps comprises a main flap portion depending along a fold line from a respective first or second side panel and a side flap portion extending laterally from the flap main portion beyond a peripheral edge of the respective first or second side panel; and wherein the first zone (3100a, 3110a, 3120a, 3130a) of each modified edge portion comprises a plurality of pairs of creasing lines, all the creasing lines extending in parallel in the longitudinal direction of the curved edge portion, wherein the distance between two creasing lines in each pair as measured along the width of the modified edge portion is less than the distance between two adjacent pairs of creasing lines as measured along the width of the modified edge portion.