Ilford Rapid Fixer 500 mL

Fissaggio per pellicole e carte.

Il Rapid Fixer Ilford è un fissaggio rapido concentrato universale, adatto a tutte le pellicole e carte fotografiche in bianco e nero.

Con questa confezione si possono preparare:
2,5 litri di fissaggio per pellicole
5 litri di fissaggio per carte

ILFORD RAPID FIXER è un fissatore rapido non indurente fornito come concentrato liquido che viene diluito con acqua per l'uso. È facile e comodo da usare nell'intervallo di temperatura di 18–40oC (66–104oF) per fissare pellicola e carta in bianco e nero in tutte le applicazioni di lavorazione manuale e meccanica.
ILFORD RAPID FIXER non deve essere utilizzato con indurenti fissi.
Il fissante di ILFORD RAPID FIXER è il tiosolfato di ammonio, non contiene tiosolfato di sodio (ipo).

ILFORD RAPID FIXER is a non-hardening rapid fixer supplied as a liquid concentrate that is diluted with water for use. It is easy and convenient to use in the temperature range of 18–40oC (66–104oF) for fixing black and white film and paper in all manual and machine processing applications.
ILFORD RAPID FIXER must not be used with fix hardeners.
The fixing agent in ILFORD RAPID FIXER is ammonium thiosulphate, it contains no sodium thiosulphate (hypo).
Mixing instructions
Working strength ILFORD RAPID FIXER solutions can be mixed either manually or by using automatic solution mixing equipment. If automatic mixing equipment is used follow the equipment manufacturer’s recommendations and advice.
Note Photographic chemicals are not hazardous when used correctly. It is recommended that gloves, eye protection and an apron or overall are worn when handling and mixing all chemicals. Always follow the specific health and safety recommendations on the chemical packaging. Photochemical material safety data sheets containing full details for the safe handling, disposal and transportation of ILFORD chemicals are available from ILFORD agents or directly from the ILFORD web site at. www.ilfordphoto.com
For all film fixing applications ILFORD RAPID FIXER is diluted 1+4 with water.
For use as a fixer in paper processing machines ILFORD RAPID FIXER is diluted 1+4 with water but for manual fixing applications it can be diluted either 1+4 or 1+9.
Fixer concentrates do not readily mix with water, to ensure a working strength solution performs correctly it is very important to stir it thoroughly during mixing. When making solutions make sure that the mixing vessel is large enough for the volume of solution to be mixed and stirred. Measure out the required amount of fixer concentrate and water accurately. Pour the concentrate into the mixing vessel and gradually add the water while stirring.
Ensure that all utensils, processing tanks or dishes/trays and mixing vessels are thoroughly rinsed and cleaned before mixing fresh batches of ILFORD RAPID FIXER particularly if it is being used for the first time. Wash out the mixing vessels thoroughly after use.
After filling a processor with fresh ILFORD RAPID FIXER tank solution, switch it on and allow it to get up to temperature and circulate the solutions. After the working temperature is reached leave it re- circulating for at least 10 minutes to ensure the fresh chemicals are thoroughly mixed before attempting to process any film or paper. Always replace the tank covers used on the process and replenishment solutions.
pH and specific gravity
The following table gives the pH and specific gravity (SG) for fresh, working strength ILFORD RAPID FIXER. These figures were obtained under carefully controlled laboratory conditions and may differ slightly from measurements made by users in their own working areas. Users should make their own control measurements from their own accurately mixed fresh solutions for later comparison. Ideally a pH meter should be used to measure solution pH but if one is not available pH measurement sticks can be used. These are available in various pH ranges and those covering a range from pH 4 to pH 6 are sufficient. SG can be measured by using a hydrometer and one covering the range from 1.000 to 1.200 is useful for a wide range of photographic process solutions.

dilution     pH        SG at 20oC
1+4      5.0–5.5     1.070–1.080
1+9      5.0–5.5     1.030–1.040