The canisters say something like 'process c-41 or e6'. I develop at home, so haven't tried taking it to a store to have it processed. I suspect you would be fine at Target, but if you went to a pro-lab they would spot it a mile off. In that case they would either refuse or charge more for cross-processing so i'd stick to Target for now.
Originally Posted by bvy
A lot of people say that cross processing film damages the chemicals and doubtless there are many more experts around here when it comes to colour chemistry, but in my experience the results I was getting from colour negatives in the same chemicals have been fine and it was the deterioration due to age that did for them rather than cross-processing.