MANUFACTURER
Suppress development of unexposed silver halide → less fog, cleaner highlights.
Potassium Bromide ( KBr ) Pure For Analytical Purpose - 1000g
€41.94
Net price: €34.09
Potassium Bromide ( KBr ) Pure For Analytical Purpose - 100g
€6.99
Net price: €5.68
Potassium Bromide ( KBr ) Pure For Analytical Purpose - 500g
€23.30
Net price: €18.94
Benzotriazole 1,2,3-benzotriazole BOH
€35.77
Net price: €29.08
Loba potassium bromide IR spectroscopy op.100 g
€99.61
Net price: €80.99
Potassium bromide 98% Loba extra pure, Op. 500 g
€28.47
Net price: €23.15
Potassium bromide 98% Loba extra pure, per 100 g
€8.93
Net price: €7.26
Sodium chloride 99,5% Loba AR/ACS Op.500 g
€5.71
Net price: €4.64
Sodium chloride 99.5% Loba extra pure op.1000g
€8.53
Net price: €6.93
Sodium chloride 99.5% PureLand AR/ACS Op.250g
€2.67
Net price: €2.17
SODIUM CHLORIDE solution 10% OP. 1L PureLand
€17.81
Net price: €14.48
SODIUM CHLORIDE standard solution 0.02 MOL/L OP. 1L PureLand
€18.66
Net price: €15.17
SODIUM CHLORIDE standard solution 0.05 MOL/L OP. 1L PureLand
€20.06
Net price: €16.31
SODIUM CHLORIDE standard solution 0.10 MOL/L OP. 1L PureLand
€17.65
Net price: €14.35
Standard solution SODIUM CHLORIDE 3 MOL/L OP. 1L PureLand
€17.99
Net price: €14.63
Standard solution SODIUM CHLORIDE 9 MOL/L OP. 1L PureLand
€17.65
Net price: €14.35
Even in unexposed areas, silver halide can develop a little (“chemical fog”), reducing shadow detail and muddying highlights. Restrainers selectively slow development of unexposed or lightly exposed crystals more than heavily exposed ones. Practically, they clean up highlights, reduce base fog, and improve separation in bright tones.
-
Potassium bromide is traditional and mild: it lowers fog without dramatically changing look.
-
Benzotriazole / PMT are stronger; they’re used when you need very clean highlights (old film, long dev times, warm conditions) but can reduce speed or make the developer feel “slower.”