Kodak XTOL

XTOL is revealing for films black and white produced by Kodak since 1996. Its properties make of him a revealing standard, usable with all the great majority of the films and of which the effects can be adjusted while varying dilution: an equivalent without Hydroquinone of the D-76 to some extent.

Use

The XTOL is sold out of powder (in 2 sachets, to dilute one after the other with room temperature) to form 5 liters of solution. It is used then either in a pure way, or in concentrations from 1+1 to 1+3 (the concentrations of 1+2 and 1+3 are not recommended by Kodak, this known as of many users employ them). In diluted form, the XTOL is used with bath lost (the diluted solution can be used only once).

Properties

The XTOL is characterized by a very fine grain (of pure use) at end (diluted) combined with a rather high accutance and a good clearness from contours (these effects can be adjusted while varying dilution). It offers also a very marked compensation effect (the high lights remain contained and detailed) and thus is very adapted to films as Kodak T-max (which often show high lights burned with the other revealing ones) for example. Moreover, it allows a profit of sensitivity of film going up to +0.5 according to film and dilution. This revealing is excellent in the low lights, for example with Tri-X a Kodak film: the shades are detailed and not stopped. It is advisable nevertheless to privilege a dilution with 1+2 in order to contain the high lights and to reveal the low lights correctly. The time of development to this dilution is not communicated by Kodak in its data sheets. However, for the users of Tri-X the Kodak film to format 135 exposed to 200 Iso, the time of revelation is of 12min. with 20°C in a tank Paterson (a reversal per minute).

Composition

Contrary by the great majority of revealing, the XTOL uses like developer of the Ascorbic acid combined with phénidone in the place of the Hydroquinone: he is often thus regarded as revealing a " écologique".

See too

Revealing similar

  • Paterson FX50 - similar Formula
  • Adox ATM 49 (or Calbe A49) - Similar in the effects (with a grain a little finer and an image a little less definite than the XTOL)

On Wikipédia

Other revealing:
  • Rodinal - opposite of the XTOL: grain very marked and very high accutance, not of profit speed (but a light compensation effect with high dilution).

Articles:

External bonds

  • technical Publication J-109 from Kodak, concerning the XTOL: use, time of development.
  • Kodak XTOL amongst other things to develop - a page giving of much information on the XTOL (history, formula, time)
  • The Massive Dev. Chart - Base of data in English giving times of development for the XTOL with almost the whole of films of the market.

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