可能片基导致扫描结果....

这个灰比较通透...

富士卷品质一向好....

富士片基0.122mm，比12F的薄0.003mm

D-76，7:30"

搜索到依尔福年表在1961年有记载Hyfin的发布。
在APUG一个主题High Acutance Develper里，有一篇提到药的配方。转载一下....
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Ian Grant
08-02-2009, 05:06 AM
In his book "Photographic Processing Chemistry" (1974 Focal Press), L.F.A. Mason lists a typical High Acutance Developer.
This may possibly be the formula for Hyfin, which was Ilford's High Acutance developer, available from 1961 until the early 1970's. Mason calls it a typical formula:

High Acutance Developer

Metol 0.5g
Sodium Sulphite (anhyd) 5g
Sodium Carbonate (anhyd) 5g
Water to 1 litre

Development times 15-25 minutes
Requires a minimum of 600ml of chemistry per 35mm or 120 film.

Mason notes that additions to the formula have been proposed, either 0.1g/litre Potassium Bromide or 5ml of 0.0001% Potassium Iodide solution. (He may be referring to other similar formulae like FX-1 etc)
Hyfin was sold in packets containing 5 sachets of developer each one making up 600ml of solution. I have two packets of Hyfin & will weigh the contents of a scchet next time I'm in the UK.

Hyfin instructions were:
Pan F & FP3 - 18 minutes @ 20°C
Continuous agitation for the first 10 seconds then 5 seconds every minute.
Gives 1 stop more effective film speedIn the early 60's there were 3 High Definition devopers availabe in the UK, lford's Hyfin, Kodak's High-Definition Developer & Johnson's Definol.
It's no co-incidence that Hyfin & HDD are very similar to Beutler's High Definition developer, sold as Neofin Blue, and another similar developer is Crawley's FX-1 formula.
The major differences are that Beutler has 1g Metol/litre & Crawley's FX-1 only 2.5g Carbonate + 15ml 0.0001% KI, compared to the formula above. The decrease in the Metol level compared to Beutler is likely to increase the edge effects & acutance further.
The addition of Potassium Iodide is likely to have little or no effect now as most modern films contain far higher levels in their emulsions, particularly Tmax & Delta films. It may have been more important with certain films Crawley speculates that it was needed in HDD for Pan-X
Mason would have known Crawley and his work, Ilford began manufacturing his chemistry for Paterson around 1963.

Ian
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冲的很不错，学习了。

后面那卷Neopan 400拍了一半，过两天冲...

EDU好像有页片？...

这样较容易看出各卷的分别....

按ISO400拍摄....

颗粒确实没有上次粗....

用往常搅拌的频率...

D-76，8:00"，第五次回用.....

还有一卷Arista EDU400明天冲，希望没事....