PROFESSIONAL高濃度黑白底片顯影劑，1000毫升濃縮液

Mixed a liter of this and it barely made a dent in the bottle—one batch of Tri-X at 1+9 came out with beautiful, even contrast and no fogging. The shelf life claim is what sold me, and so far it’s held up perfectly after three weeks of sitting half-used.

The concentrate is so dense that a little goes a long way—I mixed up a working solution in under five minutes and it's still sitting on my shelf months later without losing any punch. My negatives came out with that crisp, fine-grain look I've been chasing, and the consistency from roll to roll has

Two rolls of HP5 came out beautifully after just one go with this developer, and the concentrate is so strong that I barely used any for a full tank. The liquid keeps for ages on the shelf too, so I don't have to worry about it going bad between batches.