Tetenal Automatic Developer

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Tetenal Automatic Developer

Product Information

Tetenal Automatic Developer Replenisher is used for machine processing of industrial x-ray films supplied as 3 part universal developer and replenisher and is suitable for the processing of all currently available industrial Radiographic and imaging films. This chemistry is approved by both Rolls Royce and Pratt & Whitney.

• Long life high stability formulation,
• Compatible with similar chemical systems,
• Contrast control by temperature adjustment,
• Produced brilliant radiographs of high diagnostic quality.
• Very clean working.

 

Supplied in packs to make 2 x 20 Litres of working solution.

Tetenal Automatic Developer Temperature and Fixing Time

The image density and contrast of a radiograph are remarkably influenced by the development temperature and time. It is necessary to keep the developer at a specified temperature (usually 20°C/68°F for manual processing) and carry out development during a specified time. When the temperature of the developer is higher than normal, much the same results are had as obtained by extending the development during a specified time. When the temperature of the developer is higher than normal, much the same results are had as obtained by extending the development time and vice versa. In either case, however, it is most desirable that the temperature of the developer be kept within a range of temperatures of from 18 to 23°C (64.4 – 73.4°F). As the development time may vary with each brand of developer, be sure to observe the instructions given by the manufacturer. The time and temperature specifications for Tetenal automatic developer are 5 minutes and 20°C

 

Time Related Development Properties

The photographic properties of X-ray film change when the development time is changed while maintaining other conditions of development, such as temperature and agitation, constant. Speed and contrast increase to a certain extent with increasing development time but contrast may fall due to fog or other causes and the graininess may become coarser when a certain development time limit is exceeded,. Even when the development time needs to be extended so as to increase speed and contrast, a maximum limit of 8 minutes should not be exceeded at a developer temperature of 20°C (68°F).

Tetenal Automatic Developer Exhaustion and Replenishment

If the water volume is not accurately measured in the preparation of developer solutions, the resulting properties will be divergent from the original specifications and fog may result. Accurate measurement of water is therefore important. However, it should be remembered that the development capacity of even an accurately prepared developer solution decreases, as it is used. It is necessary to check the developer solution for exhaustion by maintaining records of the sizes and the number of days the Tetenal automatic developer has been used.

To obtain uniform radiographic results over a period of time, it is necessary to check the use condition of the developer solution and add developer replenisher in proportion to the quantity of film processed or at regular intervals. The rate of replenishment varies with the size and quantity of films and the average density. The developing power of the developer decreases with the increasing density or film size, and vice versa.

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Información adicional

Manufacturer	Tetenal