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  1. #31

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    Quote Originally Posted by zsas View Post
    Thanks J! Though my interest in photography is deep, but not at this point in the realm of coating due to other commitments, I'm just wondering why we've folks like me crying for the loss of APX 25 and Efke 25, but no one is making an artistian home brew for folks like me who'd buy a roll or two of 35mm/120 to play around with to 1) support home made goods, 2) a gap in our market? But maybe my query is self answered, Efke 25/APX 25 went under bc no one bought enough....
    hey andy

    i have lack of time too ... so i get my emulsions bottled. it is what happened with me in college .. It was fun to know i could make it in a pinch, but in the end grabbing a bottle ended up being easier .. i would rather eat plain vanila ice cream instead of fancy-stuff too ... coating is just a matter of melting and usunf a brush to paint it on and letting it drt (.paper at least glass is a bit more involved ) ... its not as hardcore as one might think.

    have fun!
    john

  2. #32
    Photo Engineer's Avatar
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    Andy;

    The market is too small to make some of these items commercially and some of the items you want are at the edge of what people can or will make at home.

    So, you can make an Azo type paper in 3 grades and a Kodabromide paper in 2 grades. You can make an ISO 1 - 40 emulsion that is blue or ortho sensitized. Beyond that, things start to get difficult and expensive. They can also get to be very time consuming.

    So, we, the teachers and writers of this stuff try to formulate things that are very useful but take a minimum of effort and expense. Of course, it sometimes takes thousands of dollars of R&D to make these work. Most writers freely admit that they have not make the emulsions that they publish. They just copied it from somewhere. And, almost all of those in books are wrong due to omission or comission. Grant Haist published a formula in V2 of his book set and told me that it was heavily edited by the Kodak editors.

    PE

  3. #33

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    Quote Originally Posted by Photo Engineer View Post
    Andy;

    Most writers freely admit that they have not make the emulsions that they publish. They just copied it from somewhere. And, almost all of those in books are wrong due to omission or comission. Grant Haist published a formula in V2 of his book set and told me that it was heavily edited by the Kodak editors.

    PE
    andy

    while much of what PE said is true, if you go to thelightfarm you will see emulsions that people (WROTE AND ) MADE and USED ( including the OP ).
    the emulsion i made 25 + years ago was made from a photographic book published for people who wanted to make and use
    emulsions ... i dont' remember which one it was, but it was easy ( just a few ingredients ) the publishers didn't make up-stuff and it worked fine ... i haven't made the ones that are in the back of silver gelatin ( the liquid emulsion book )
    and i haven't made the ones at the light farm, but the aj-12 emulsion published in the (apug's ) articles section is one that a lot of people have made and used.
    its not all smoke an mirrors as some would suggest ...

    i must admit it would be very nice to take a workshop with today's master-chefs ... it would be easy to see what it is supposed to be like instead
    of a blind guess ..

    have fun!
    john

  4. #34
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    John, I have read formulas by Baker, Wall, Eder and others as well as copies of formulas from the FIAT and BIOS reports posted here. They all have omissions or errors. True, you can make a functional emulsion from them, but this emulsion is not what they made.

    One simple reason is that we cannot buy the gelatin that they did. Another is that they don't usually publish addition times. And if you think that is unimportant, see the graph I posted earlier.

    A simple published formula such as AJ-12, published here on APUG cannot be tinkered with unless you know a lot about what you are doing or have some expect backup. This is a Kodak formula, but one that can only be made exactly as written.

    PE

  5. #35
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    Hi PE, isn't ADOX's below product a game changer?
    http://www.adox.de/english/ADOX_Pape...togelatin.html
    Andy

  6. #36
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    I plan to take a workshop on emulsion making in the near future at GEH.

    We are lucky to have this wonderful group in Rochester and I for one plan to take groups there to our benifit.

  7. #37
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    Quote Originally Posted by zsas View Post
    Hi PE, isn't ADOX's below product a game changer?
    http://www.adox.de/english/ADOX_Pape...togelatin.html
    I'm sure it is a wonderful product Andy, but how is it a game changer?

    The Photographers Formulary has been selling photograde gelatin for years. Their current products are both from Kodak's former plant in Peabody MA.

    PE

  8. #38
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    Quote Originally Posted by Photo Engineer View Post
    John, I have read formulas by Baker, Wall, Eder and others as well as copies of formulas from the FIAT and BIOS reports posted here. They all have omissions or errors. True, you can make a functional emulsion from them, but this emulsion is not what they made.

    One simple reason is that we cannot buy the gelatin that they did. Another is that they don't usually publish addition times. And if you think that is unimportant, see the graph I posted earlier.

    A simple published formula such as AJ-12, published here on APUG cannot be tinkered with unless you know a lot about what you are doing or have some expect backup. This is a Kodak formula, but one that can only be made exactly as written.

    PE
    Oy! Ron,

    Yuh just gotta stop saying stuff like this. People take you seriously and at your word, but they shouldn't. I just can't figure out why you want to make things seem so hard. But, words are only words. For more than words, please go to www.thelightfarm.com . The current homepage image (the big one) is AJ-12, coated as film. I made the recipe in a couple of hours, and I wouldn't have even needed electricity if I'd so chosen. Also, less than $5 for the whole batch of emulsion. The modifications I made were only arithmetic and a little trial and error. If you want to call that experience and expert backup, I guess it would be rude to object. In any case, there is a lot of info on TLF and I'm always only an email away. editor@thelightfarm.com.

    For even more info, please start here: http://www.thelightfarm.com/cgi-bin/...tent=05Mar2013.

    I am pulling together the next set of web workshops, so stay tuned. Plans are to get through to ASA 100 (summer speed) ortho ("X2Ag") by the end of summer. If anyone doesn't want to wait for more tutorials, there are a lot of proven recipes on The Light Farm.

    John: thanks for the support! Much appreciated.
    d
    www.thelightfarm.com
    Dedicated to Handmade Silver Gelatin Paper, Film, and Dry Plates.

  9. #39
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    $5 for a batch?

    I'd like to buy from your chemistry source.
    - Ian

  10. #40
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    Ian,

    Artcraft has silver nitrate for $379 a pound right now. (I advocate buying bulk, once you know you're addicted to emulsion making!) That comes to a little over $4 for the 5 g used in AJ-12, and the KBr, KI, and gelatin are about a buck total, if that.
    www.thelightfarm.com
    Dedicated to Handmade Silver Gelatin Paper, Film, and Dry Plates.



 

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