| Vacuum
Forming |
A
process whereby a print on a plastic sheet is heated and distorted
over a mould by air pressure. Used for embossed or relief prints,
and producing 3D items such as blister packs, cycle helmets. |
| Value |
Indicates
the degree of lightness or darkness of a colour in relation to a
neutral grey scale. The scale of value ranges from 0 for pure black
to 10 for pure white. |
| Varnish |
(See
"Extender") 1) Transparent material that is printed or
coated over a print. 2) A medium in which pigment may be ground
to make an ink. 3) A material that may be added to an ink to increase
its transparency. |
| Vehicle |
The
liquid portion of a pigmented coating or ink including the binders
or adhesives and modifiers. |
| Vignette |
A
transition from one colour or intensity to another. |
| Vinyl |
A
versatile thermoplastic available in rigid as well as limp form.
|
| Virtual
Reality |
Interactive
3D graphics. Simulates realism to users in application areas ranging
from scientific visualisation and visual simulation to high-definition
design and digital film production. |
| Virus |
An
malicious implant put into software that can cause failures of systems
such as data or memory loss. |
| Viscometer |
An
instrument to measure the viscosity (resistance to flow) of a liquid. |
| Viscosity |
The
internal resistance to flow possessed by a liquid. It is determined
by measuring the force required to shear the liquid, i.e. to move
one layer over another in orderly flow without turbulence at a defined
rate. |
| VOC's |
Volatile
Organic Compounds. Derivatives of oil which evaporate into the atmosphere. |
| Volatile |
Subject
to evaporation at a relatively low temperature. |
