OBA
OBA is the abbreviation for ” optical brightening agents” or “optical brighteners”.
Lexicon
OBA
Optical brighteners are additives used by paper manufacturers to make a paper look whiter and brighter.
Offset
Offset printing is an indirect printing process.
Indirect means that the printing plate and the substrate do not come into direct contact with each other, but a medium in between is used as a transfer medium.
It is the most widespread printing process.
Online proof
An online proof (correct: contract proof) is an ISO 12647-7 certified test equipment for the graphics industry. It is called online because it is ordered “online”, i.e. via the Internet.
Opacity
The term opacity refers to the opacity or covering power of a colour. A colour with high opacity is opaque and allows little or no light to shine through. A colour with low opacity is transparent or translucent and allows some or all of the light to pass through. The opacity of a colour depends on factors such as the concentration of the pigment, the type of pigment, the layer thickness and the type of substrate on which the colour is applied. Pigments with higher opacity generally produce colours with …
opaque
A colour is described as opaque if it is non-transparent, i.e. light cannot shine through it and no objects or colours are visible behind it.
OPP
‘OPP’ stands for “Oriented Polypropylene”, a type of plastic film. OPP film is made from polypropylene and is characterised by its orientation. The orientation of the material is achieved by a special manufacturing process in which the film is stretched to improve its physical properties. OPP films are transparent, glossy and have a smooth surface. They offer high clarity, are tear-resistant, water-repellent and have a good barrier effect against moisture, oils and gases. These properties make OPP films versatile and they are used in various areas, especially in the packaging …