T
TACK
The stickiness of ink required to adhere properly to the type of substrate being printed on. Too much tack can cause the fibers to be pulled off the paper causing picking.
TCF
Totally Chlorine Free. Pulp bleached without any chlorine chemicals whatsoever.
TENSILE STRENGTH
The ability of the paper to withstand the stress and strain applied to it before breaking down and pulling apart.
THERMO MECHANICAL PULP
Mechanical pulp in which the wood chips are heat-treated before refining (usually referred to as TMP). In some modern plants a degree of chemical treatment is employed as well (chemi-thermo mechanical pulp or CTMP).
THICKNESS
The distance between one surface of a paper and the other. Also known as caliper. Measured in micrometers.
TICKET BOARD
Another name for pasteboard, although coated board can be included in this grade, which is used for tickets or parallel purposes. May be white or tinted.
TISSUE PAPER
Soft, lightweight paper, often creped, usually between 17 and 30g/m2 in weight that is used for hygienic, household and several other purposes.
TWIN-WIRE
Paper or board made on a papermaking machine with a duplicated wire part. In this way two sheets are formed and combined wire side to wire side so that the finished sheet has two exactly alike printing surfaces.
TWO-SIDEDNESS
An unintended difference of varying degree in surface texture or shade between the two faces of a paper or board, which is inherent in the method of production.
