I recently had a large number of 8x10 Portra 160NC sheets processed at a commercial lab. Most of the sheets suffered from vertical streaking and uneven densities, particularly in areas of blue sky or grey mid tones. They also lacked contrast and the Kodak writing on the rebate appeared thin compared to previous negatives.
The lab doesn't seem to have diagnosed the reasons for the poor processing. However, as they have refunded and paid for the cost of re-shooting, I am obliged to get the new sheets developed there again. Obviously, I am very apprehensive and would welcome any advice or opinions on what is likely to be the cause and how the same problems are to be avoided.
Thanks in advance for your help......
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