PROFESSIONAL Rapid Fixer Hardener, 1 ลิตร เข้มข้น ใช้ผสมได้ 20 ลิตร

A bottle this size goes a long way—20 liters of working solution from just one liter of concentrate is great value. The hardener really does its job; my negatives come out of the wash with noticeably fewer scratches and the emulsion feels tougher.

I wasn't expecting the hardener to make such a difference, but my film comes out of the tank noticeably stiffer and the emulsion feels tougher when I'm handling it wet. This liter concentrate is supposed to yield 20 liters of working solution, which is plenty for a long stretch of darkroom sessions.

This 1-liter concentrate stretches further than I expected, easily making the full 20 liters for my darkroom sessions. Mixed it with the fixer part A and my prints have that nice firm feel afterward, plus no scratches even with the roller transport.