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Raise pH so the developing agent works fast enough.

Alkalis / accelerators

Borax Sodium tetraborate x 5H2O - 1000g Borax Sodium tetraborate x 5H2O - 1000g
Vendor: SYNTHETIKA
Price:

176,89 Kč

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Net price: 143,81 Kč

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Borax Sodium tetraborate x 5H2O - 10g Borax Sodium tetraborate x 5H2O - 10g
Vendor: SYNTHETIKA
Price:

43,40 Kč

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Net price: 35,26 Kč

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Borax Sodium tetraborate x 5H2O - 25 000g Borax Sodium tetraborate x 5H2O - 25 000g
Vendor: SYNTHETIKA
Price:

2 358,49 Kč

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Net price: 1 917,45 Kč

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Borax Sodium tetraborate x 5H2O - 5000g Borax Sodium tetraborate x 5H2O - 5000g
Vendor: SYNTHETIKA
Price:

707,55 Kč

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Net price: 575,24 Kč

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Borax Sodium tetraborate x 5H2O - 500g Borax Sodium tetraborate x 5H2O - 500g
Vendor: SYNTHETIKA
Price:

117,92 Kč

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Net price: 95,87 Kč

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Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 1000g Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 1000g
Vendor: SYNTHETIKA
Price:

211,50 Kč

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Net price: 171,93 Kč

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Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 100g Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 100g
Vendor: SYNTHETIKA
Price:

70,52 Kč

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Net price: 57,31 Kč

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Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 25 000g Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 25 000g
Vendor: SYNTHETIKA
Price:

2 948,11 Kč

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Net price: 2 396,82 Kč

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Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 5000g Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 5000g
Vendor: SYNTHETIKA
Price:

940,09 Kč

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Net price: 764,33 Kč

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Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 500g Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 500g
Vendor: SYNTHETIKA
Price:

117,51 Kč

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Net price: 95,52 Kč

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Sodium Hydroxide ( Lye ) Caustic Soda - 1000g = 1kg Sodium Hydroxide ( Lye ) Caustic Soda - 1000g = 1kg
Vendor: SYNTHETIKA
Price:

170,99 Kč

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Net price: 139,03 Kč

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Sodium Hydroxide ( Lye ) Caustic Soda - 100g Sodium Hydroxide ( Lye ) Caustic Soda - 100g
Vendor: SYNTHETIKA
Price:

54,25 Kč

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Net price: 44,10 Kč

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Sodium Hydroxide ( Lye ) Caustic Soda - 25 000g = 25kg Bag Sodium Hydroxide ( Lye ) Caustic Soda - 25 000g = 25kg Bag
Vendor: SYNTHETIKA
Price:

2 181,60 Kč

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Net price: 1 773,64 Kč

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Sodium Hydroxide ( Lye ) Caustic Soda - 500g Sodium Hydroxide ( Lye ) Caustic Soda - 500g
Vendor: SYNTHETIKA
Price:

105,78 Kč

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Net price: 86,03 Kč

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Potassium carbonate anhydrous 99.5% PureLand AR/ACS Op.1000g Potassium carbonate anhydrous 99.5% PureLand AR/ACS Op.1000g
Price:

1 344,34 Kč

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Net price: 1 092,98 Kč

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Potassium carbonate anhydrous 99.5% PureLand AR/ACS Op.500g Potassium carbonate anhydrous 99.5% PureLand AR/ACS Op.500g
Price:

716,98 Kč

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Net price: 582,90 Kč

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PureLand anhydrous potassium carbonate, hard packed, 1000 g HDPE bottle PureLand anhydrous potassium carbonate, hard packed, 1000 g HDPE bottle
Vendor: PureLand
Price:

246,46 Kč

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Net price: 200,35 Kč

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PureLand potassium carbonate anhydrous chda op.250g HDPE bottle PureLand potassium carbonate anhydrous chda op.250g HDPE bottle
Vendor: PureLand
Price:

100,83 Kč

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Net price: 81,96 Kč

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Soda lye, SODIUM HYDROXIDE SOLUTION 50% Soda lye, SODIUM HYDROXIDE SOLUTION 50%
Vendor: SYNTHETIKA
Price:

766,51 Kč

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Net price: 623,17 Kč

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Sodium Carbonate - Soda ash ( Ammoniacal ) Sodium Carbonate Light Sodium Carbonate - Soda ash ( Ammoniacal ) Sodium Carbonate Light
Vendor: SYNTHETIKA
Price:

117,92 Kč

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Net price: 95,87 Kč

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SODIUM CARBONATE standard solution 0.05 MOL/L OP. 1L PureLand SODIUM CARBONATE standard solution 0.05 MOL/L OP. 1L PureLand
Price:

448,11 Kč

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Net price: 364,33 Kč

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Sodium carbonate, anhydrous 99.5% Loba AR Op.500 g Sodium carbonate, anhydrous 99.5% Loba AR Op.500 g
Vendor: LOBA
Price:

408,90 Kč

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Net price: 332,43 Kč

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Sodium carbonate, anhydrous 99.5% Loba extra pure op.500 g Sodium carbonate, anhydrous 99.5% Loba extra pure op.500 g
Vendor: LOBA
Price:

308,08 Kč

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Net price: 250,47 Kč

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Sodium hydroxide (caustic soda) PureLand chda microgranules op.1kg HDPE bottle Sodium hydroxide (caustic soda) PureLand chda microgranules op.1kg HDPE bottle
Price:

222,94 Kč

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Net price: 181,25 Kč

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SODIUM HYDROXIDE 1 MOL/L titrated solution OP. 1L PureLand SODIUM HYDROXIDE 1 MOL/L titrated solution OP. 1L PureLand
Price:

317,63 Kč

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Net price: 258,25 Kč

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Most developing agents only work well at elevated pH. Alkalis raise the solution pH, converting the developer into its more reactive form and speeding up electron transfer to silver halide. Think of alkali as the “throttle”: higher pH = faster development, higher effective film speed, and often higher contrast.

  • Carbonates (sodium/potassium carbonate) are common because they’re strong enough for normal development and provide good buffering.

  • Hydroxides are very strong and can produce “high-energy” developers — fast, punchy, but easier to overdevelop or fog.

  • Borax/metaborate are gentler, used when you want smoother tones or lower contrast.

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