English (United Kingdom)
Print
TSIMD detects misregister and baggy edges
At the printer
TSIMD is an important property for all printing grades as the paper during converting is stressed in the machine direction.

Misregister in four colour printing is caused by a re-wetted paper which will expand more in the direction that has less elasticity, i.e. least TSI, and that is always in the cross direction. A roll change to a roll with another TSI level will need a longer tuning period and consequently lead to more rejects.

Slack edges because of drop in TSIMD result in sheet wrinkling or breaks in the printing press or even earlier on the paper machine or on the winder.

At the corrugated board manufacturer
Many owners of L&W TSO Tester have used TSICD to correlate different compression strength properties, such as SCT (STFI) and RCT, with a very good result.

If a liner board is produced with a compression strength specification, the paper machine should be run producing a board with high TSICD numbers. If the specification is bursting strength (Mullen), it is recommended to use high TSIMD.

Also a combination of single facer and double backer with similar hygro-expansion, predicted with the TSI level, will have less curl problems.

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Slack edges because of drop in TSIMD result in sheet wrinkling or breaks in the printing press or even earlier on the paper machine or on the winder.