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Tack - The amount of stickiness in printing inks that makes them adhere to the substrate while minimizing dot gain. Too much tack can cause surface picking.

Tear Sheet - Actual ad removed from a publication and sent to the advertiser, often with the invoice.

Text - The body matter of a page or book as distinguished from the heading and art.

Thermography - Method of printing using colorless resin powder that takes on the color of underlying ink.

TIFF - Tagged Image File Format. A graphics and page layout file format for desktop computers. Used as an intermediary file format for both color and black and white images. TIFF is used to transfer documents between different applications and computer platforms.

Tile - A method used when a page is too large to be output in its entirety by the output device. The page is divided into pieces that allow for overlap so that it can be reassembled as a whole.

Tint - A solid color reduced either by screening or by adding white ink. Also, a halftone of a specified dot percentage, but less than 100%.

Tissue Overlay - A thin, translucent paper placed over artwork (mostly mechanicals) for protection and used to indicate color breaks and corrections.

Tonal Compression - The reduction of an originalï¿½s tonal range to a tonal range achievable though the reproduction process.

Tonal Range - The difference between the brightest and the darkest tone in a photograph or offset lithographic print.

Tone - The character of a color, its quality or lightness.

Tooth - A characteristic of paper, a slightly rough finish, which permits it to take ink readily.

Trade Shop - Service bureau, printer or bindery working primarily for other graphic arts professionals, not for the general public.

Traditional Color Angles - The screen angles used most often in color separation, considered to be optimal for reducing moire patterns-yellow at 0? cyan at 15? black at 45?and magenta at 75?

Transparency - Positive photographic image on film allowing light to pass through.

Transparent Ink - A printing ink which does not conceal the color beneath. Process inks are transparent so that they will blend to form other colors.

Trapping - A method of overlapping adjoining colors or inks that helps minimize the possibility of a fine white line appearing between two colors, caused by mis-registration of color negatives. Also, the ability to print a wet ink film over previously printed ink.

Trim - To cut the excess paper from the edges of a publication after it has been printed and bound.

Trim Marks - Marks on the outside of a keyline to indicate where the piece is to be cut.

Two-up - Having two images of each item (see one-up).