Scoring and Creasing
From DT Online
Sheet materials may be scored or creased to make folding easier - and more accurate. Scoring is the process of scribing, or even partly cutting through, the material along the line to be bent or folded.
Note: Scoring or scribing cuts or scratches the surface of material. This can create a stress concentration and be a potential failure point. Scribed lines on soft metals such as Aluminium should therefore be placed on the inside of a bend where they will be closed up.
Creasing is similar to scoring but the surface is compressed rather than cut. It is a good way of preparing soft materials such as card for folding and can be done using an empty Biro or the back edge of a pair of scissors.
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