lab defects

Question 1

A string of glass extended across the interior of the container. A bird swing from side to side comes from the back. From seam to seam on the front side.

Answer 1

Birds-swing and spike

Question 2

It refers to the finish which has excessive glass projecting upward from the inside edge of the finish.

Answer 2

Overpress

Question 3

This defect refers to a thin, thread-like imperfection in the glass.

Answer 3

Filament

Question 4

A finish with a crack running across the top surface and extending down towards the neck.

Answer 4

Split

Question 5

It refers to a narrow, shallow, surface crack. The growth at the top of the finish is known as crizzled finish.

Answer 5

Check

Question 6

The phrases used to characterize the poor distribution of glass includes thin shoulder, slug neck, choke neck, and heavy bottom

Answer 6

Poor Distribution

Question 7

It refers to a tiny blister that usually appears on or near the sealing surface. However, it may appear anywhere on
the glass container.

Answer 7

Soft Blister

Question 8

It refers to partial fractures, usually found in the heel area.

Answer 8

Cracks

Question 9

It refers to any opening that causes leakage. It occurs most frequently on bottles with pointed corners.

Answer 9

Pinhole

Question 10

It arises when a small glass piece is chipped away from the finish.
When this occurs, on the top, it causes sealing issues, leaks, and product deterioration.

Answer 10

Chipped finish

Question 11

These are the most serious defect in the vitreous body. They are crystalline solid inclusions that occur in the vitreous body and significantly alter the look and optical homogeneity of glass products.

Answer 11

Stone

Question 12

It refers to a sunken centre
in base of the container. It is described as a bottom that is sagging that makes
the container unstable when put on a
flat surface.

Answer 12

Rocker Bottom

Question 13

It refers to inconsistencies of several components of the container mold, resulting In a poorly formed shape.

Answer 13

Mismatch

Question 14

The excess glassware along the mold’s separation line forms a sharp edge.

Answer 14

Fin

Question 15

In this defect, the finish is oval-shaped and can be pinched or flattened.

Answer 15

Out of Round Finish

Question 16

It refers to a shoulder which is not blown up. It degrades the container, fully and may cause issues on the filling line.
It can also result in undercapacity.

Answer 16

Sunken (dropped shoulder)

Question 17

It is a finish which has a light surface crack in the threads or in the middle.

Answer 17

Tear

Question 18

It is a series of horizontal waves on folds on the side of the container.

Answer 18

Washboard

Question 19

A hard blister appears ar large bubbles in the glass. It may appear on the finish, sidewall, or base.

Answer 19

Hard blister

Question 20

It refers to glassware with carbon or filthy deposit on it. It may appear on the walls or the base.

Answer 20

Dirt

Question 21

It refers to a localized thick patch on one side of the bottom. Also called
“Wedge-Bottom Heel Tap-slug Bottom”

Answer 21

Heeltap

Question 22

It refers to marks on the surface of the bottle that is caused by several factors.

Answer 22

Mark

Question 23

It refers to a rough patch caused by separating that had previously touched while still soft and sticky

Answer 23

Stuck

Question 24

This defect simply refers to a glassware
neck that has been stretched longer
than specified.

Answer 24

Long neck

Question 25

In thir defect, there are very little bubbles in the glass. It may appear on the finish, sidewalls, or base. This problem cannot always be remedied by the production department.

Answer 25

Seeds