A particular shape. A rectangular figure having greater length than width, may have angle or rounded corners and parallel or nearly parallel sides.
> Ask about Oblong

Outside dimension. The outside dimensions of a container, package or part. In metal drums, it is the diameter over the rolling hoops.
> Ask about OD

A finish defect. A finish which is usually oval-shaped and which may be pinched or flattened in one or more places. Also call "out-of-round".
> Ask about Off-Gage Finish

A finish defect. A finish which is formed with the two halves of the mold shifted out of alignment, either vertically or horizontally.
> Ask about Offset Finish

This method of printing utilizes printing plates rather than silk screens to transfer the ink to the containers. Offset printing is more exact than silk screening, and is practical for multiple color labeling. Offset printing is utilized primarily on round containers. Because plates are engraved for each color rather than making screens, offset is more expensive than silk screening. The process involves transferring ink from a printing plate to a rubber blanket and subsequently to the sheet (surface to be decorated).
> Ask about Offset Printing

Descriptive of material or substance which will not transmit light.
> Ask about Opaque

Oriented PET.
> Ask about OPET

An uneven surface somewhat resembling an orange peel.
> Ask about Orange Peel

The opening in a container through which product is dispensed.
> Ask about Orifice

Plug or fitment with a controlled-diameter opening. When inserted in the I.D. of a bottle neck finish, it reduces the flow of product being dispensed.
> Ask about Orifice Reducer

A finish defect. A finish which is usually oval-shaped and which may be pinched or flattened in one or more places. Also call "off-gage".
> Ask about Out of Round

A plastic container manufacturing variance in which a round container, when formed, does not remain round.
> Ask about Out-of-Round

A general defect. Ware which is tilted to one side or which is bulged, sunken-in, or mis-shapen.
> Ask about Out-of-Shape Ware

A particular shape. A container which has an elliptical cross section perpendicular to the major axis.
> Ask about Oval

A secondary closure that fits over the primary closure or seal mechanism. It protects the primary closure from accidental dispensing. Overcaps are also used to enhance the design of a package.
> Ask about Overcap

The capacity of a container to the top of the finish or to the point of overflow.
> Ask about Overflow Capacity

An outer container usually made of steel, wood or fibre, designed to enclose and protect one or more less durable inner containers.
> Ask about Overpack

A finish defect. A finish which has excessive glass projecting upward from the inside edge of the finish. See also "wire edge" defect.
> Ask about Overpress

A chemical reaction involving combination with oxygen to form new components.
> Ask about Oxidation