TETENAL Parvofin tabs- 10 tablets Part A and Part B Art. No. 105500 - For a maximum of 3 litres black and white negative developer. Capacity: max. 20 films 135-36

PARVOFIN TABS is a fine-grain compensation developer in tablet form for all black and white negative films: for classic emulsions as well as for modern T-grain films.

PARVOFIN TABS go back to a legendary powdered Parvofin formula, which was already launched by Tetenal in the 1950s – the relaunch of the brand is based on the adaptation of the formula to the film emulsions available today, taking into account current legal requirements for the chemical ingredients of photochemicals. Parvofin contains no boron compounds.
The PARVOFIN TABS formula stands for a natural, wide-ranging tonal reproduction with an optimal balance of sharpness and fine grain. The factory film speed is fully exploited. The extraordinarily long shelf life of the PARVOFIN TABS of at least 4 years allows a particularly high economic efficiency, especially if only sporadic work is carried out over longer periods of time. A very special advantage of the PARVOFIN TABS is the temperature-independent storage in a very wide range from - 40°C to + 40°C ambient temperature.

Mixing
The approach is done by dissolving PARVOFIN TABS in hot water. Ideal is hot water of about 50 - 60 °C
– higher temperatures are possible, but lower temperatures slow down the dissolution of the tablets.
The portioning "per 1 tablet A and B for 150 ml" as a normal dilution allows a particularly simple and at the same time very variable handling: Depending on the filling quantity of the development tank used, the required number of tablets is dissolved in water, in example: 2 x A and 2 x B for 300 ml or 3 x A and 3 x B for 450 ml and so on. Optionally, you can work with an economy dilution. Then the portioning is "1 tablet each A and B for 300 ml". Likewise, a multiple of 300 ml can be applied in steps of 300 ml each: i.e. each 2 x A and 2 x B for 600 ml, 3 x A and 3 x B for 900 ml and so on.
Whether the normal dilution or the economy dilution is applied is an individual decision of the user
– both options allow an equally high quality development. The economical dilution requires longer development times, but it also stands for lower costs.
Recommended for the mixing is the use of a sufficiently large mixing vessel made of plastic as well as a mixing rod. Pour hot water into the mixing vessel until the requested volume is reached and wait briefly until the air bubbles have disappeared. Then carefully add the tablets A and B - simultaneously or one after the other. Wait a few minutes until a first dissolving is recognizable, then crush the tablets with the mixing rod more and more and stir the developer solution until the tablets are completely dissolved. After cooling to 20°C respectively to the desired temperature, the developer is immediately ready to use.

TETENAL Parvofin tabs- 10 tablets Part A and Part B Art. No. 105500 - For a maximum of 3 litres black and white negative developer. Capacity: max. 20 films 135-36

PARVOFIN TABS is a fine-grain compensation developer in tablet form for all black and white negative films: for classic emulsions as well as for modern T-grain films. PARVOFIN TABS go back to a legendary powdered Parvofin formula, which was already launched by Tetenal in the 1950s – the relaunch of the brand is based on the adaptation of the formula to the film emulsions available today, taking into account current legal requirements for the chemical ingredients of photochemicals. Parvofin contains no boron compounds.

The PARVOFIN TABS formula stands for a natural, wide-ranging tonal reproduction with an optimal balance of sharpness and fine grain. The factory film speed is fully exploited. The extraordinarily long shelf life of the PARVOFIN TABS of at least 4 years allows a particularly high economic efficiency, especially if only sporadic work is carried out over longer periods of time. A very special advantage of the PARVOFIN TABS is the temperature-independent storage in a very wide range from - 40°C to + 40°C ambient temperature.

Mixing

The approach is done by dissolving PARVOFIN TABS in hot water. Ideal is hot water of about 50 - 60 °C – higher temperatures are possible, but lower temperatures slow down the dissolution of the tablets. The portioning "per 1 tablet A and B for 150 ml" as a normal dilution allows a particularly simple and at the same time very variable handling: Depending on the filling quantity of the development tank used, the required number of tablets is dissolved in water, in example: 2 x A and 2 x B for 300 ml or 3x A and 3 x B for 450 ml and so on. Optionally, you can work with an economy dilution. Then the portioning is "1 tablet each A and B for 300 ml". Likewise, a multiple of 300 ml can be applied in steps of 300 ml each: i.e. each 2 x A and 2 x B for 600 ml, 3 x A and 3 x B for 900 ml and so on.

Whether the normal dilution or the economy dilution is applied is an individual decision of the user – both options allow an equally high quality development. The economical dilution requires longer development times, but it also stands for lower costs. Recommended for the mixing is the use of a sufficiently large mixing vessel made of plastic as well as a mixing rod. Pour hot water into the mixing vessel until the requested volume is reached and wait briefly until the air bubbles have disappeared. Then carefully add the tablets A and B - simultaneously or one after the other. Wait a few minutes until a first dissolving is recognizable, then crush the tablets with the mixing rod more and more and stir the developer solution until the tablets are completely dissolved. After cooling to 20°C respectively to the desired temperature, the developer is immediately ready to use.