1. Fixing: It is recommended to use F-5 acidic fixer

Sodium thiosulfate (Haibo) 240.0g

Anhydrous sodium sulfite 15.0g

28% glacial acetic acid 48ml

Boric acid 7.5g

Potassium 矾 15.0g

Add water to 1000ml

The purpose of fixing is to remove the emulsion that is not sensitive on the film, so make sure that all of the emulsions are clean. Use a fresh acidic fixer for 5-10 minutes.

  2, development: D-23, D-76 developer is recommended

D-23 low contrast particle developer D-76 particle developer

Clear water (52 ° C) 750ml 750ml

Mito (Miduo) 7.5g2.0g

Anhydrous sodium sulfite 100.0g100.0g

Hydroquinone (Jian'an) 5.0g

Borax 2.0g

Add water to 1000ml1000ml

It should be dissolved and prepared in the above order during preparation. The stock solution should be used without dilution. The temperature is 20 ° C and the development time is 6-10 minutes.

The contrast of the film changes with the strength of the developing agitation, and the faster the stirring, the higher the contrast. The development process should control the stirring strength.

If necessary, the development time can be appropriately extended to increase the film sensitivity.

3. Stop shadow: This is the process of stopping development. After development, the film is immersed in 2% glacial acetic acid solution for 20 seconds.

4. Washing: Rinse with running water for at least 15 minutes.

5, drying: In order to avoid the water stains during drying and affect the production of photos, you can use a special sponge (foam) or a large piece of absorbent cotton dipped in water to gently dry the water stain on the surface, and then hang to dry, also It can be dried in a drying cabinet at a temperature of 30-40 ° C or at a clean and dust-free place at room temperature.


1. Fixing: It is recommended to use F-5 acidic fixer

Sodium thiosulfate (Haibo) 240.0g

Anhydrous sodium sulfite 15.0g

28% glacial acetic acid 48ml

Boric acid 7.5g

Potassium 矾 15.0g

Add water to 1000ml

The purpose of fixing is to remove the emulsion that is not sensitive on the film, so make sure that all of the emulsions are clean. Use a fresh acidic fixer for 5-10 minutes.

  2, development: D-23, D-76 developer is recommended

D-23 low contrast particle developer D-76 particle developer

Clear water (52 ° C) 750ml 750ml

Mito (Miduo) 7.5g2.0g

Anhydrous sodium sulfite 100.0g100.0g

Hydroquinone (Jian'an) 5.0g

Borax 2.0g

Add water to 1000ml1000ml

It should be dissolved and prepared in the above order during preparation. The stock solution should be used without dilution. The temperature is 20 ° C and the development time is 6-10 minutes.

The contrast of the film changes with the strength of the developing agitation, and the faster the stirring, the higher the contrast. The development process should control the stirring strength.

If necessary, the development time can be appropriately extended to increase the film sensitivity.

3. Stop shadow: This is the process of stopping development. After development, the film is immersed in 2% glacial acetic acid solution for 20 seconds.

4. Washing: Rinse with running water for at least 15 minutes.

5, drying: In order to avoid the water stains during drying and affect the production of photos, you can use a special sponge (foam) or a large piece of absorbent cotton dipped in water to gently dry the water stain on the surface, and then hang to dry, also It can be dried in a drying cabinet at a temperature of 30-40 ° C or at a clean and dust-free place at room temperature.


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