This has been covered before, but I think it's worth posting Fomapan response into a separate thread for easier searching for other users:
------------ Fomapan Response --------------
Keep you informed that our Quality dept. has confirmed that the described white dots are residues of not decolorized anti-halo layer used by our film FOMAPAN 100 – 120 size. Considering your mentioned LOT/emulsion number (021056-3) we have to admit that in this formula we used more hardened anti-halo layer and that´s why decolorizing is not so easy.
From our side we are going to make replacement to you from actual LOT/emulsion number, which is all right. Please, specify & prove how many rolls of FOMAPAN 100 – 120 you bought from the mentioned emulsion number and let us also your full delivery post address.
In case of your already exposed & processed negatives we recommend to you the following procedure to remove the residues of remaining anti-halo layer:
1) Prepare working solution in minimum with 40% of ethanol (optimally 70%).
2) Put carefully the films into spiral´s developing tank or a spiral with the film into similar transparent container with enough ethanol solution, with emulsion layer inside of the cylinder tank/container.
3) Keep the negatives in this solution approximately 45 minutes and make moderate movement each 4-5 minutes.
4) Wash sheets of the negatives in running water from tap for 2-3 minutes.
5) Make standard drying including wetting agent (FOTONAL).
If you may decide to use also other films from the same emulsion number, we advise you to follow this procedure of processing:
1) Exposed films put inside of the spiral´s developing tank.
2) Pour distilled water or water without minerals into this developing tank and keep the films in this solution for 20-30 minutes. Occasional inversion is convenient. This solution, ca. 600 ml, is possible to use in maximum for 2 rolls.
3) Immediately after pouring the water out you can fill the tank by developing working solution keeping standard conditions of developing, best using more alkaline developer, e.g. FOMADON R09.
4) After developing we recommend to stop process just by water bath, best running filtered water, in minimum for the time of 30 seconds in water´s temperature 12-18° C. Using acidic stop bath like FOMACITRO and others is not convenient in this case, because there are needed alkaline baths to help with dissolving the hardened anti-halo layer.
5) Standard fixing.
6) Wash the strips of the negatives in running water for 20-30 minutes (according to higher or lower temperature).
7) Use ethanol solution and other steps (1-5) as described in previous paragraph.
We are indeed sorry for made inconveniences to you & Hope you will achieve to save your processed negatives.
------------ Fomapan Response --------------
Keep you informed that our Quality dept. has confirmed that the described white dots are residues of not decolorized anti-halo layer used by our film FOMAPAN 100 – 120 size. Considering your mentioned LOT/emulsion number (021056-3) we have to admit that in this formula we used more hardened anti-halo layer and that´s why decolorizing is not so easy.
From our side we are going to make replacement to you from actual LOT/emulsion number, which is all right. Please, specify & prove how many rolls of FOMAPAN 100 – 120 you bought from the mentioned emulsion number and let us also your full delivery post address.
In case of your already exposed & processed negatives we recommend to you the following procedure to remove the residues of remaining anti-halo layer:
1) Prepare working solution in minimum with 40% of ethanol (optimally 70%).
2) Put carefully the films into spiral´s developing tank or a spiral with the film into similar transparent container with enough ethanol solution, with emulsion layer inside of the cylinder tank/container.
3) Keep the negatives in this solution approximately 45 minutes and make moderate movement each 4-5 minutes.
4) Wash sheets of the negatives in running water from tap for 2-3 minutes.
5) Make standard drying including wetting agent (FOTONAL).
If you may decide to use also other films from the same emulsion number, we advise you to follow this procedure of processing:
1) Exposed films put inside of the spiral´s developing tank.
2) Pour distilled water or water without minerals into this developing tank and keep the films in this solution for 20-30 minutes. Occasional inversion is convenient. This solution, ca. 600 ml, is possible to use in maximum for 2 rolls.
3) Immediately after pouring the water out you can fill the tank by developing working solution keeping standard conditions of developing, best using more alkaline developer, e.g. FOMADON R09.
4) After developing we recommend to stop process just by water bath, best running filtered water, in minimum for the time of 30 seconds in water´s temperature 12-18° C. Using acidic stop bath like FOMACITRO and others is not convenient in this case, because there are needed alkaline baths to help with dissolving the hardened anti-halo layer.
5) Standard fixing.
6) Wash the strips of the negatives in running water for 20-30 minutes (according to higher or lower temperature).
7) Use ethanol solution and other steps (1-5) as described in previous paragraph.
We are indeed sorry for made inconveniences to you & Hope you will achieve to save your processed negatives.