TETENAL Hardener 1L

I’ve been adding 25 mL per litre to my film fixer, and the negatives come out noticeably firmer and more resistant to scratches during drying. The clear dosage instructions for different film types make it easy to get consistent hardening without guesswork.

Finally a hardener that clearly states the exact ml per litre for different film types—I used 25ml for my 120 roll and the emulsion held up perfectly during a hot-water wash. No more worrying about scratches in the drying process.

I've been using this hardener with my standard fixer and it's made a noticeable difference in keeping the emulsion on fiber-based papers from getting too soft. The 25 ml per litre ratio is easy to measure and one litre will last me through many sessions.