Bottle and Closure Inspection

Physical Evaluation

An evaluation where the bottle is visually checked for the presence of bottle defects

Critical Defects

What kind of defect that prevents the glass bottle from performing their intended function of safety holding the product causing danger to consumers

Major defects

What kind of bottle defect when the handling of the bottle is difficult

Minor defects

What kind of bottle defect that adversely affect the appearance but not the function of the bottle

Vernier Caliper

What tool measures the height and diameter of bottles

Closures

• Caps

• Lids

• Plugs

• Liners

A device that seals a bottle to protect its contents. closures can be ___, ___, ___ or ____.

• Biological

• Shallow CT

• Roll on

• Brandy cork

• Pry off

• Pilfer Proof

Types of closure

• Finish

• Neck

• Body

• Bottom

Parts of Bottle:

Finish

Top of the container above the neck ring parting line

Neck

Part which extends from the parting line to the curve at the base of the neck

Body

Main part which holds the product

Bottom

Part of the container on which it stands upright

• Bird-swings and spikes

• Over press

• Filament

• Split

• Poor distribution

• Soft blister

• Cracks

• Pinhole

• Chipped finish

• Contamination of foreign materials

Types of Critical Defects

Bird-Swings and spikes

Long thin strands of glass inside the bottle would probably break off when bottle is filled

Over press

A small ridge of glass has been formed on the sealing surface of the finish

Filament

Hair-like string inside the bottle

Split

An open crack starting at the top of the finish and extending downward

Poor Distribution

Uneven thickness of glass

Soft blister

A thin walled bubble in glass

Cracks

Partial fractures

Pinhole

Any opening causing leakage

Chipped finish

Pieces broken out of the top edge in the manufacturing process

• Mismatch

• Fin

• Out of round finish

• Stone

• Rocker bottom

Major defects consist of:

Out of round finish

A pinched, flattened or oval finish

Stone

Small inclusion of nonmelted material

Rocker bottom

Warped bottoms which makes bottle unstable when placed on a flat surface

• Sunken (dropped shoulder)

• Tear

• Washboard

• Heeltap

• Seeds

Minor defects consist of:

Sunken (dropped shoulder)

Shoulder not fully blown, sagged after blowing

Washboard

A wavy condition of horizontal lines in the bottle

Heeltap

Heavy glass on one side of the bottom