SAMPLE SIZE – 1938*876
THICKNESS – 4 TO 12
PROCEDURE – A twin tire impact or of mass 50 kg is allowed to strike on specimen which clamped on frame of structure from 3 levels of height(190,450,1200) freely.
CRITREIA – The specimen should not break. If it does, collect the 10 largest particles. Their combined weight should not be more than the weight of glass having an area of 6500 mm square taken from original test piece.

SAMPLE SIZE – 610*610
THICKNESS – 5 TO 12
PROCEDURE – A steel ball of about 63.5 mm dia. and weighing 1040 g shall be freely dropped freely from 1 m so as to strike specimen within 25 mm from its center.
CRITREIA – The specimen should not broke.

SAMPLE SIZE – 1100*360
THICKNESS – 4 TO 12
PROCEDURE – Test specimen shall impacted with centre punch having 0.2 mm tip on 13 mm from longest side edge. The particle count should be taken on fracture specimen by making a square of 50 mm in an area excluding 25 mm from edges and 100 mm radius from impact point.
CRITREIA – The minimum count of particle must be 40 for thickness 4 to 12 mm.

KEY POINT
* Glass surface must be dust and defect free
* he overall glass waveness and edge lift must be less than 0.3 mm
* In case of abnormal trend identify the lot & inform the Production & QA incharge.
PROCEDURE
Cut the sample test pcs of size 360 mm x 1100 mm.
Temper/Heat strength the glass in furnace like height must be perpendicular to roller and width parallel to roller
Place the glass in flat surface as like logo should come on bottom side which must be contact with flat surface (ie: check should be carried out in surface with no logo)
Place the Roller Gauge on top surface of glass as like parallel to height.
Extrude the portion 150 mm from edges and make origin zero in gauge then note reading displayed in main digital gauge covering central area of glass while moving gauge from one end to other end
For Over all waveness use formula Rw=Pm+Vm
For Edge lift note the reading observe in secondary gauge covering area 150 mm from edges

SAMPLE SIZE – ANY
THICKNESS – 4 TO 12
PROCEDURE – Glass diagonals to be measured using tape.
CRITREIA –Tolerance up to +/-3 to 5 mm is allowed on diagonal for thickness 4 to 12 mm.

SAMPLE SIZE – ANY
THICKNESS – 4 TO 12
PROCEDURE – Glass thickness to be measured with micrometer/ venire caliper from 25 mm away from edge at center of each side. The average of four measurements to be taken. .
CRITREIA – Tolerance up to +/- 0.2 to 0.5 mm is allowed for thickness 4 to 12 mm.

SAMPLE SIZE – ANY
THICKNESS – 4 TO 12
PROCEDURE – Glass to view from one side by illumining fluorescent lamps kept at 50 cm gap on black mat finished wall on other side. The glass should be placed at 1 m from lamp and to be observed from 2 and 4 m respectively.
CRITREIA –No fault to be present on visible condition.

SAMPLE SIZE – ANY
THICKNESS – 4 TO 12
PROCEDURE – Using a 200 watts mercury source projector placed at a distance of 4.65 m from white screen, the spot fault image of defect is projected or created on screen. The glass is placed at 0.60 m away from screen.
CRITREIA – Compare spot fault image with distortion gauge of various diameter.

SAMPLE SIZE – 450*800
THICKNESS – 4 TO 12
PROCEDURE – A screen bearing an assembly of black and white stripes is observed through glass from a 9 m distance in a center line of axis. The position of sample is 4.5 m from screen in a rotating frame. The glass being examined is rotated from angle 90 to 0 degree.
CRITREIA – The angle at which optical distortion occur shall not exceed 50 degree angle.