Canning and Fish Packaging Technology

Unit 13 - Paper and Board

13.1.5.2.4.Principle operations in board and box making

• Corrugate one layer of paper called the fluting or corrugating medium and then using an adhesive, bond it to another layer of paper called liner. This results in a single faced paper.
• Using an adhesive, paste a third layer of paper (the second liner) to the corrugated side of single faced paper producing a single wall board.
• Trim the sheets at the edges, cut into blanks (Blank is nothing but rectangular pieces of required size to make a box).
• Apply indentions or score lines by pressing on the blanks that are perpendicular to the flutes and these score lines later serve as hinges for the box flaps. The type of board decides the width, depth and shape of score line.
• Print the blanks for identification and sales appeal.
• Make slots for the flaps. Small width of the material at the end of the score limes is removed to enable easy folding of the overlapping faces or flaps.
• Apply indentations that are parallel to the flutes that will become edges of the box. These indentations are called creases.
• Fold the blanks on its crease and seal it by stitching/glueing/gum taping or by stapling. The box is ready for the user.