We got the P5000 a couple months ago, if you're using Accurip, it will Not print all black channels. They said the printer is still too new and they don't have a plan right now for updating it. I talked to Inkjetcarts.us when we first got the printer and he said they are planning to have refillable carts for it, but not yet still.
So far we have just been using the Epson Photo black ink through Accurip and our films have been totally fine.
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