Re: Acufine Acu-1 substitute

piterengel wrote:
> Hello, because it is quite difficult to find Acu-1 developer, is there
> a subsitute with analogue characteristics? Microdol for example? I
> would like to use it with MACO IR film, to obtain less grain than the
> one I have normally with HC-110. Thanks.
_____
In an old booklet by ZONE V Inc. on page 25 is an Acufine substitute:

   Water at 125F     2-1/2 cups         500 ml
   Sodium sulphite   2 TBSP + 1 tsp     53 g
   Hydroquinone      1-1/2 tsp          4.5 g
   Sodium carbonate  1/4 tsp + 1/8 tsp  2.3 g
   Borax             1/2 tsp            2.5 g
   Potassium bromide 1/8 tsp            10 ml of a 10 wt% solution
   Phenidone         1/8 tsp            0.25 g or 125 ml concentrate
   Water to make 1 liter

Below the formula it says: "Phenidone in this formula gives a boost to 
shadow detail.  Development time for roll film at 68F is 2-1/4 to 5-1/4 
minutes."

The phenidone concentrate:
   Water at 125F     3 cups
   Sodium bisulphite 1 tsp
   Phenidone         1 tsp
   Water to make 1 liter

   125 ml or 4 oz contain 0.25 g or 1/8 tsp of phenidone

The sodium sulphite is necessary to help the phenidone dissolve properly.

I don't like using tsp and TBSP volume measures.  As well, i have 
provided the mass equivalents of the various component's tsp and TBSP 
volumes.  The conversions to grams were given in the ZONE V booklet.

I have used this formula on 35 mm film with good results.  I am not 
familiar with MACO IR film.  The Acufine substitute formula is worth a 
try.  Let us know how it works.
-- 
Regards / JCH