If you mailed us a sheet it will be tested ( hope you sent us the batch number from the box as well ):
You will get one of three replies ( and a full written explanation )
1 ) Justified : a problem exists with that sample
2 ) Cause not certain : where we cannot identify the issue even after a full examination or cannot replicate* the sample
( *We keep samples of all the batches of film and paper we produce for up to 5 years, that way we can process 'the control' to see if we can replicate an issue )
3 ) Not justified, essentially the product is fine, it has happened during or post exposure.
Simon ILFORD Photo / HARMAN technology Limited