Glossary
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- T.C.F.
- Totally Chlorine Free, pulp bleached without the use of any chlorine gas or chlorine dioxide.
- Tack
- In printing inks, the property of cohesion between particles, the separation force of ink needed for proper transfer and trapping on multi-colour presses. Tacky ink has high separation forces and can cause surface picking or splitting of weak papers.
- Tagged image file format (TIFF)
- A file format for exchanging bitmapped images (usually scans) between applications.
- Terabyte (TB):
- One trillion bytes.
- Text
- The body matter of a page or book, as distinguished from the headings.
- Thermal dye sublimation
- Like thermal printers, except pigments are vaporised and float to desired proofing stock. Similar to Thermal Dye Diffusion Transfer, or D2T2.
- Thermal printers
- These printers use a transfer sheet that carries ink in contact with the paper or transparency, and a heated print head driven by digital data that touches the transfer sheet to transfer images to the right points on the page.
- Thermal-mechanical pulp
- In papermaking, made by steaming wood chips prior to and during refining, producing a higher yield and stronger pulp than regular ground wood.
- TIFF
- See Tagged Image File Format.
- Tints
- Various even tone areas (strengths) of a solid colour.
- Tolerances
- The specification of acceptable variations in register, density, dot size, plate or paper thickness, concentration of chemicals and other printing parameters.
- Toner
- Imaging material used in electrophotography and some off-press proofing systems. In inks, dye used to tone printing inks, especially black.
- Tooth
- A characteristic of paper, a slightly rough finish, which permits it to take ink readily.
- Toxic
- Substances that are capable of harming living organisms with the outcomes ranging from chronic to lethal.
- Tracing Paper
- Paper made from chemical pulp where the fibres have been "beaten" mechanically until they become gelatinous and translucent. Chemical treatment may also be applied to breakdown the fibre structure of the sheet to increase transparency. The closing of the inter fibre spaces produces a surface more akin to a film than normal paper so special precautions arte required during printing.
- Transparent copy
- In photography, illustrative copy such as a colour transparency or positive film through which light must pass in order for it to be seen or reproduced.
- Transparent ink
- A printing ink, which does not conceal the colour beneath. Process inks are transparent so that they will blend to form other colours.
- Transpose
- To exchange the position of a letter, work or line with another letter, word or line.
- Trapping
- In printing the ability to print a wet ink film over previously printed ink. Dry trapping is printing wet ink over dry ink. Wet trapping is printing wet ink over previously printed wet ink. In pre-press, refers to how much overprinting colours overlap to eliminate white lines between colours in printing.
- Trim marks
- In printing, marks placed on the copy to indicate the edge of the page.
- True Art Board
- Art board which is manufactured on genuine art board machines which produce characteristics of high bulk with excellent stiffness and rigidity.
- Twin-wire machine
- In papermaking, a fourdrinier paper machine with two wires instead of one producing paper with less two sidedness.
- Two-sheet detector
- In printing presses, a device for stopping or tripping the press when more than one sheet attempts to feed into the grippers.
- Two-sided
- (Double sided) In paper denoting that both sides are the same and will give the same printed result. Usually applies to coated paper.
- Type gauge
- In composition, a printer's tool calibrated in picas and points used for type measurement.
- Type high
- 23.3mm the standard in letterpress.