I bought recently a batch of expired (2002) Kodak Portra 400 NC 120 in order to use them in a HOLGA project. The seller told me that the rolls were refrigerated and when he had tried one of them, a few time ago, looked ok. However, I had read somewhere that it might be better to overdevelop +1/3 for better results.
Thus, should I ask for C41 overdeveloping in the lab or doesn't matter? In fact, I want normal colour quality.