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I S O
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R E G I S T E R E D
GENERAL DEFECTS
Guide To Container Inspection
BROKEN WARE
DOWN WARE
Ware which is cracked or broken into pieces.
Ware that has fallen over and onto the conveyor.
UNDER-MIN HEIGHT
UNEVEN OR BAD DISTRIBUTION
Height that is below minimum allowable specification.
BENT OR CROOKED FINISH
Uneven wall thickness
BLISTERS Large bubbles in the glass.
A finish which has a bent or crooked appearance.
FINISH DEFECTS
Internal stresses in the container due to poor annealing.
A rough piece of glass on the outside of the container.
BULGED FINISH
CHECKED FINISH
CHECKS UNDER FINISH
CHIPPED FINISH
A finish which has cracks or actual pieces of glass broken out of it.
A finish which is bulged out of shape by blowing or mechanical action.
A finish which has a light surface crack in the threads or in the middle of finish.
Surface cracks which occur on or near the parting line between the neck and the finish.
A finish from which a small section is broken on the top or side.
LINE OVER
NECK RING SEAM
OFFSET FINISH
OVERPRESS
A finish formed out of alignment, either vertically or horizontally.
A finish which has excessive glass projecting upward from the inside edge of the finish.
A superfine groove across the sealing surface that can cause a container leak after the filling process.
SADDLE FINISH
SEEDS
SPLIT FINISH
STONES
Very small bubbles in the glass.
A finish which has a crack across the top surface–extends from the top of the finish down toward the neck.
Small pieces of refractory or unmelted batch materials.
CHOKED NECK OR BORE (NARROW NECK)
DANNY NECK OR TEAR ON NECK
An obstruction in the bore of the neck.
A small surface section of glass torn from the neck of the bottle.
SHOULDER CHECKS
SUNKEN SHOULDERS
THIN SHOULDERS
Surface cracks on the shoulder of the containers. They are usually wavy in appearance.
A shoulder which is not fully blown up.
A shoulder which has a thin section.
BIRD CAGE (BIRD SWING)
BLACK SPOTS
BLANK AND BLOW MOLD SEAMS
A fin or seam of glass lying across the top or the side of the finish.
TEAR UNDER FINISH
UNFILLED FINISH
A finish which has a small surface section of glass torn from under it.
A finish which is incompletely filled, in the top, the bead, or the thread.
DIRTY NECK
LONG NECK
A neck which has a dirty or scaly appearance.
A neck that has been stretched longer than specified.
PINCHED NECK
STUCK GLASS PARTICLES
A neck which has been pushed or pinched.
Small glass particles stuck to the inside of the container. Most common in wide mouth ware.
BLISTERS
BODY CHECKS A crack or fracture in the body of the container.
BODY DIMENSIONS
BRUSH MARKS
Large bubbles in the glass
Relatively large seams extending from the shoulder to the container base. Blank seams tend to veer off from the mold seam.
BULGED SIDES
COLD MOLDS
DIRTY WARE
DRAG MARKS
FREAKS
The sides of a container (usually panel shape) which are pushed out.
Dappled or wavy appearance in the body of the container.
Ware which has carbon or dirty deposits on it.
A series of fine vertical laps near the shoulder or neck of the container.
A container so badly formed or squeezed out of shape that it can be seen at almost any distance.
LETTER CHECKS
LOADING MARKS
OIL MARKS
PRESSURE CHECKS
Small cracks or fissures which appear in or run off lettering or embossing.
Vertical laps on the surface of the container, may be in the body or neck or both.
STONES
STUCK GLASS PARTICLES
BAFFLE MARKS
STUCK WARE
BROKEN FINISH
A finish which has a scaly appearance and which may even have black spots on it.
Small black specks in the container.
STRUCTURAL DEFECTS
Height that exceeds maximum allowable specification.
A check or crack oriented vertically.
DIRTY OR ROUGH FINISH
A neck where the finish is tilted to one side.
OVER-MAX HEIGHT
VERTICAL TEAR
A finish with many fine surface fractures, mainly across the top.
Small pieces of refractory or unmelted batch materials.
BASE DEFECTS
Containers which are tiled to one side due to bottom not being level.
CRIZZLED FINISH
A string of glass extending across the inside of the container. A bird swing from side-toside comes from the back side (blanks). From seam to seam front side.
BODY DEFECTS
OUT-OF-SHAPE WARE (LEANER)
A vertical surface check located in the inside of the finish.
BENT NECKS
SHOULDER DEFECTS
A check or crack oriented horizontally.
CORKAGE CHECKS
A gradual slope or dip in the finish that has a saddle like finish.
NECK DEFECTS
HORIZONTAL TEAR
Strings of small bubbles in the container.
Checks characterized by thin, vertical cracks appearing at the seam.
Dimensions out of specification for various diameters and perpendicularity.
Fine vertical lines in the side or neck of a container.
HOT OR PANEL CHECKS
LAP MARKS OR WRINKLES
Cracks in the container body on the edge or side, deep V-shaped, going through the wall.
A slight fold on the surface of the glass–usually horizontal (can also be found in finish).
SEEDS
SHEAR MARKS
SPIKES
Very small bubbles in the glass.
A C-shape mark in the glass, attributable to the action of the shears.
A small projection of glass in the body of the container.
WASH BOARDS
SUNKEN SIDES
SWAB WARE
THIN WARE
Small glass particles stuck to the inside of the container. Most common in wide mouth ware.
The side of a container (usually panel shape) that is not fully blown up or may have sunk after release from the blow mold.
Residue left on the container from the IS Machine swabbing process.
Thin spots in the container, which are below the minimum acceptable level.
A series of horizontal waves or folds on the side of the container.
BASE CHECK
BASE LEANER
BASE SPIKES
BLACK SPOTS
BLISTERS
DIRTY WARE
A seam occurring between the baffle and the blank mold.
Small checks that occur on or near the rounded part of the bottom contact surface.
A bottom which has sagged so that the container is unstable when placed on a flat surface.
A small projection of glass in the bottom of the container.
Small black specks in the container.
Large bubbles in the glass.
Ware which has carbon or dirty deposits on it.
OIL MARKS
SEEDS
STONES
Very small bubbles in the glass.
Small pieces of refractory or unmelted batch materials.
STUCK GLASS PARTICLES
SWAB WARE
Strings of small bubbles in the container.
SWUNG BAFFLE
Small glass particles stuck to the inside of the container. Most common in wide mouth ware.
Residue left on the container from the IS Machine swabbing process.
The baffle mark has swung to one side and is not central in the bottom of the container.
Above defects can be inspected by Emhart Powers machinery, manufactured by Emhart Glass. For further information or to order the 40th Anniversary Inspection Poster, please contact your nearest Emhart Glass Representative. HEADQUARTERS: CHAM, SWITZERLAND Phone: ++41 (41) 749 4200 Fax: ++41 (41) 749 4271
WINDSOR, CT USA*
ELMIRA, NY USA*
SINGAPORE
Phone: ++1 (860) 688 8551 Fax: ++1 (860) 683 7652
Phone: ++1 (607) 734 3671 Fax: ++1 (607) 734 1245
Phone: ++65 778 1466 Fax: ++65 778 9433
Phone: ++81 (44) 222 7371 Fax:++81 (44) 222 4868
C HAM, SWITZERLAND
SUNDSVALL, SWEDEN *
NEUSS , GERMANY
DEGO (SAVONA), ITALY
Phone: ++41 (41) 749 4200 Fax: ++41 (41) 749 4271
Phone: ++46 (60) 199 100 Fax: ++46 (60) 199 261
Phone: ++49 (2131) 3595 0 Fax: ++49 (2131) 3595 125
Phone: ++39 (019) 51 66 1 Fax: ++39 (019) 51 66 302
DONCASTER, UK
FRESNES, FRANCE
MADRID, SPAIN
OWENSVILLE, MO USA
Phone: ++44 (1302) 347 700 Fax: ++44 (1302) 327 810
Phone: ++33 (1) 46 15 55 77 Fax: ++33 (1) 46 15 55 81
Phone: ++34 (91) 883 6816 Fax: ++34 (91) 883 2063
Phone: ++1 (573) 437 2132 Fax: ++1 (573) 437 3146
* ISO 9001 REGISTERED
TW1635
Consult the Emhart Glass publication "GLASS CONTAINER DEFECTS—Causes and Remedies" for more information on these defects.
KAWASAKI, JAPAN