Follow Us: Twitter LinkedIn Facebook


Specialty Graphic Imaging Association
SGIA Glossary

Definition Glossary

Sixth Edition

Language and our ideas about how it is interpreted change rapidly. The Specialty Graphic Imaging Association (SGIA) is aware of this and continues its effort to keep our constituents well informed about changes to the increasingly complex industry terminology. This publication represents the most recent changes.

| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | Y

tablet (Graphics Tablet)

An input device that uses a stylus or specialized mouse to write or draw on the tablet surface to communicate with the computer.


(1) Condition of being sticky; (2) The relatively low splitting force of ink; (3) A large loose stitch used as a temporary fastener of fabric.

tack rag

A treated cloth used to remove dust or other foreign material from a surface. 

tack surface

A surface having a sticky feel.

tack-free finish

Any coating or ink that is not sticky to touch after curing or drying.


An additive used to improve stickiness of an adhesive film; also refer to detackifier.


Instrument used to measure the stickiness of material by pressing two surfaces together under a known weight for a given time period, and then using a steadily increasing force to separate them.

tactile response

The sudden snap-back of a membrane switch.

tactile signage

High contrast, raised or incised sign intended for the visually impaired.

tactile switch

An assembly that provides a positive snap-action response.

taffeta weave

A particular type of weave for screen mesh where single strands in the width direction (weft) cross over then under single strands in the length direction; a plain weave.


A strip made of cardstock, paper, or plastic attached to an item to identify, classify, or label it.

tag stock

Thin flexible cardboard available in white and a range of colors.

take-off device

A mechanical device for removing freshly printed substrates from the press.


A hydrated magnesium silicate used to reduce gloss and give velvet finish in ink formulations.

tamper proof adhesive

A label adhesive that is extremely aggressive and will not permit removal in one piece.

tamper proof label

Pressure sensitive label material where removal after application is not possible without destroying the label.

tamper-proof label

A pressure sensitive made of low strength face material so attempted removal of the label results in its destruction.


A production furnace for melting glass.

tap out

A spot of ink applied to a substrate with the finger, using a tapping action to distribute the ink evenly to approximate printing film thickness.

taped neck

An additional piece of flat knit generally sewn over the original seam, attaching the neck to the body of the garment.


To become gradually thinner or narrow towards one end; diminish, make smaller.


Acceptable acronym for Technical Association of the Pulp and Paper Industry (US).

TAPPI (GE) brightness

The reflectance of blue light measured under carefully controlled geometric, photometric, and spectral conditions.


The portion of the original to be scanned.

tarnish proof label

Pressure sensitive labels that are free of substances that might discolor or blemish copper or silver.

tear strength

(1) The force required to initiate or continue a tear in a material under specified conditions; (2) The force required to tear an elastomer divided by the sample thickness.

tear tab

An additional area of face stock attached by the release liner to a pressure sensitive label produced in single form to facilitate removal of the release liner.

tearing resistance

(1) Internal (or continuous) measured where the edge of the material has been cut prior to the actual tear, expressed in grams of force required to tear 16 sheets; (2) Edge-tearing resistance measures the force required to make an initial tear; (3) Torsion-tearing resistance of paper or paperboard is the energy expanded in propagating a tear when the tearing force is applied in such a manner as to create a twist or torque.


A trademark of the DuPont Corporation for polytetraflouoroethylene, a waxy opaque material.

telephone poles

An embroidery needle that is larger than a number 14.


Acceptable abbreviation for temperature.

temperature humidity controls

Equipment or device for regulating both temperature and humidity in given areas.

temperature tapes

Paper material treated with a heat sensitive colored substance that drastically changes color at a specified temperature.


Having the required degree of hardness or elasticity.

tempered glass

Glass that has been strengthened by chemical tempering or by rapid cooling from near its softening point.