So sad to see all that scrapped equipment...And here it is sometime in 2016, in all its (former) glory, waiting to be towed away for one last time.
View attachment 172157 View attachment 172158 View attachment 172159 View attachment 172160
View attachment 172161 View attachment 172162 View attachment 172163
View attachment 172164
Early methods of sensitizing silver left dead grains which were useless. These were called "high silver" or "silver rich" materials. As technology improved, the process for sensitizing became better and silver levels were decreased. As they were, grain went up but so did sharpness and thus, they made finer grains at the same speed. (following me so far?). Thus, today's films are finer grained but lower silver with better sharpness and equal or higher speed. Today, about 300 mg would equal 500 - 1000 in days gone bye (mg/ft square).
So, there it is simply.
PE
I think its also a very clever decision from Ferrania, as it demonstrates to the world that they are capable of producing film.
It also sends a clear message to the likes of Kodak that there is a market for such films and beating them to release a long forgotten film is a smart move, because they do intend to re-release some of their older B&W films by the looks.
But whats more important is probably the fact that they can get some extra income while they actually test and refine their coater after many years of disuse.
The Slow-Medium speed B&W market is getting crowded!Then why not buying the eFKe formulas and start making their emulsions again?
I think its also a very clever decision from Ferrania, as it demonstrates to the world that they are capable of producing film.
It also sends a clear message to the likes of Kodak that there is a market for such films and beating them to release a long forgotten film is a smart move, because they do intend to re-release some of their older B&W films by the looks.
But whats more important is probably the fact that they can get some extra income while they actually test and refine their coater after many years of disuse.
OK, that is interesting to know.
Do you have any idea why the high silver films such as Efke were so popular?
There has not been any other manufacturer making films with such high silver content (probably for the same reasons you mention) for quite some time.
I believe Efke had high contrast, so perhaps this is what people liked, but I expect others will know more who have shot the film themselves.
because they do intend to re-release some of their older B&W films by the looks.
Really?? which ones?
I found this by googling: (old ferrania films that appear on my google search):
Ferrania P3 (1950s)
Ferrania P30 80ASA
Ferrania P33 160ASA (early 1960s)
Ferrania P36 320ASA
all panchromatic
Now, the business of FILM Ferrania is color, but I think they could have some commercial success if they package P30 film in 126 format. There are tons of Instamatic and 126 format cameras out there for really cheap, and anyone can develop 126 since the film width is 35mm.
I do love the mix of Imperial and Metric in (mg/ft square)
A succinct explanation of "silver rich" thank you, could you just expand that logical development path of sensitisation progress with the role of crystal growth shapes which obviously interacts here to affect silver content and sensitivity as well? What contribution did that make to further silver content reduction relative to sensitisation?
Presumably the P30 will have a "conventional" crystal structure at the silver content level quoted as well as the presumed lower, to "modern" emulsions sensitisers?
Thanks flavio81
That makes complete sense.High silver was touted because of its so-called high image quality compared to some modern films. It is nothing more than a marketing issue for some that cannot do the correct sensitization. In this case, we know that Ferrania can do it (proper sensitization) so they are doing it for speed and grain to get very high quality images rather than some companies that can't do it.
I cannot do it and so my emulsions need higher silver than comparable Kodak emulsions. The correct sensitization is quite secret and very difficult. I just use plain old sulfur or sulfur + gold. Modern sensitizations use many esoteric chemicals.
The ratio is often as high as 50% and as low as 10%. If it goes too high, you get pepper grain accompanying the low speed. Dead grains and pepper grain are not necessarily related. They can appear separately. Pepper grain is an issue of mixing or adding the ingredients when making the emulsion, or not having enough or the right type of gelatin. Pepper grains appear as black dots on the film everywhere. Larger grains are those that tend to be dead. One manufacturer had that problem on some of their film.
PE
OK, so the whole silver thing with Efke was purley marketing?It is a myth. "high silver" doesn't give you contrast in a continuous tone film.
I expect that the myth arose because the lithography films - not continuous tone, but rather just black and white and used in the printing industry - did require a lot of silver to do their job.
Even if probably P30 will not become my primary BW film I'm getting some (and I still have some old-stock p30 around!), and now I can't wait for the color film. Well done!
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?