Dear Brunella
The inspection committee said that the picture quite clear and believe that nobody will accept this insulator.
Visual check is the first priority. If EGAT accept like your explanation, EGAT substation will be full of defect insulator.
Now, they are checking the other insulators and found that it is not look like brand new. The insulators are look dirty, not cleaning before shipment.
Please send new insulator for replacement.
Best regards,