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'G Force' Scratch Repair Polishing
System
SGS Test Report dated
15th November 1999
Report No. 133075-1
| Client: |
Glas-Weld Systems Inc ., 20578 Empire
Avenue , Bend, Oregon 97701. |
| Subject: |
Optical Tests on Repaired Glass. |
| Sample ID
The Client submitted ten, 12-inch
by 12-inch by ¼-inch
thick pieces of laminated glass identified as 2B, 2C,
3A, 3B, 4B, 4C, 5A, 5B, 5C and 11A.
The samples were submitted on November 11, 1999 (SGS
USTC Tracking No. 30774). |
| Procedure
Each piece of glass was tested “as received” for
Optical Deviation and Visibility Distortion as outlined
in Section 15 of the referenced ANSI/SAE Z26.1-1990 Standard.
One surface of each piece of glass
was then “scratched” using
400 grit wet or dry silicon carbide sandpaper and a 1lb
steel ball. A 1-inch wide strip of sandpaper was placed
around the steel ball and a 4-inch long section of glass “scratched” by
moving the steel ball back and forth for ten strokes.
Each piece of glass was then tested for Optical Deviation
and Visibility Distortion. The “scratched” area was then
repaired by the Client using the Glas-Weld Scratch Removal
System with 2-inch and 4-inch diameter circular discs.
Samples 2B, 2C, 4B, 4C and 5A were repaired using the
4-inch disc; samples 3A, 3B, 5B, 5C and 11A were repaired
using the 2-inch disc. The “repaired” glass was then
re-tested for Optical Deviation and Visibility Distortion. |
Test |
Condition of Glass |
Observation |
| Optical Deviation |
"As Received" |
No shift of the
secondary image beyond the point of tangency with the inside
edge of the circle was observed in any of the ten submitted
samples. No defects in the glass were observed. |
| Optical Deviation |
"Scratched" |
Light being scattered by the scratched
area beyond the point of tangency with the inside edge of
the circle on all ten of the 'scratched' samples. |
| Optical Deviation |
"Repaired" |
No shift of the secondary image
beyond the point of tangency withthe inside edge of the circle
was observed. No scattering of light was observed. Each
of the ten pieces of glass were visually returned to their "as
received" condition. |
| Visibility Distortion |
"As Received" |
No light and dark
patches were observed in any of the ten submitted samples
up to a distance of 25 inches from the screen. |
| Visibility Distortion |
"Scratched" |
The scratched areas were visible
on the screen up to a distance of 25 inches on all ten samples. |
| Visibility Distortion |
"Repaired" |
No light and dark patches or scratches
were observed in any of the ten samples up to a distance
of 25 inches from the screen. Each of the ten pieces
of glass were visually returned to their "as received" condition. |
Larry Burmer
Senior Project Engineer
SGS US Testing Company Inc
5555 Telegraph Road
Los Angeles
CA 90040 |
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