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A-16 Appendix A—Specifications
Gluing. Gluing specifications for multipart forms are as follows:
• Spot gluing should be applied along both sides.
• Spot-gluing should be applied at the alternate positions from
the top to bottom sheet.
• Glue should be applied evenly without wrinkling or creasing.
• Paper thickness change due to gluing should not exceed 0.05
mm.
Crimp Fastening. Crimp specifications for multipart forms are as
follows:
• Double crimp fasteners (4-tail) should be applied to the same
positions on both sides of the forms. (See the figure on the
next page.)
Single crimp fasteners (4-tail) are also acceptable.
• In consideration of displacement between the top and bottom
layers, a spacing of at least
1
/
3
in. should be used for form
design.
• Displacement between sheets in 5-part forms should not
exceed
2.2 mm in self-print testing.
• The combination of gluing on one side and crimp fasteners on
the other side is allowed.
• The crimp fastener pitch should be a maximum of 2 in.
When the total thickness of forms is 0.3 mm or less and the
paper width is 10 in. or less, a pitch of 3 in. is allowed.