Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,930   Posts: 1,556,847   Online: 952
      
Page 5 of 7 FirstFirst 1234567 LastLast
Results 41 to 50 of 62
  1. #41
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    23,191
    Images
    65
    Bob;

    You get one tone from the first developer and another tone from the positive image in the second developer. If bromide is the only difference, then it is due to bromide, but if there are changes in Metol and / or HQ, then all bets are off. Same for Sulfite. Even BTAZ or PMT can alter the image tone as is well known.

    You probably cannot reverse the order of the tones though unless you add a wash step before the second developer such that all of "toning" chemistry A is removed before developer B is entered and the flash is done.

    PE

  2. #42
    Bob Carnie's Avatar
    Join Date
    Apr 2004
    Location
    Toronto-Ontario
    Shooter
    Med. Format RF
    Posts
    4,676
    Images
    14
    Bromide is the only difference.. From what I remember from Mr Jolly's note the bromide(restrainer) changes the grain structure or clumping structure during the second development, which then gives a different type of tone for the second development. I have seen the difference just can't explain it well.
    Quote Originally Posted by Photo Engineer View Post
    Bob;

    You get one tone from the first developer and another tone from the positive image in the second developer. If bromide is the only difference, then it is due to bromide, but if there are changes in Metol and / or HQ, then all bets are off. Same for Sulfite. Even BTAZ or PMT can alter the image tone as is well known.

    You probably cannot reverse the order of the tones though unless you add a wash step before the second developer such that all of "toning" chemistry A is removed before developer B is entered and the flash is done.

    PE

  3. #43
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    23,191
    Images
    65
    The form of the developed silver grains changes. There are several types such as filamentary, spherical, clumps and etc. Bromide can change this form from one to another during development (but not afterwards). Many chemicals do the same. There have been a number of papers on this.

    PE

  4. #44

    Join Date
    Oct 2009
    Location
    Central Florida, USA
    Shooter
    Multi Format
    Posts
    3,928
    Quote Originally Posted by Bob Carnie View Post
    Gang up on the Sodium Sulphite as you can use it for hypo clear as well.
    If you use the two dev method gang up on the Potassium Bromide as you can use it for your Bleach Sepia toning that you
    are now going to be doing from scratch.

    I did get a 5LBS bottle of Sodium Sulfite and Sodium Carbonate.

    I think the recipe calls for Sodium Bromide. NOT Potassium Bromide.... Did I mess this up?
    Develop, stop, fix.... wait.... where's my film?

  5. #45
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    23,191
    Images
    65
    Either salt will work, but you must adjust for the difference in molecular weight.

    PE

  6. #46
    Bob Carnie's Avatar
    Join Date
    Apr 2004
    Location
    Toronto-Ontario
    Shooter
    Med. Format RF
    Posts
    4,676
    Images
    14
    No you did not make a mistake

    If you read further into the notes there is a section on duo tone methods which uses the second bath with Potassium bromide.. The colour change happens in the toning not the dev as PE points out.
    If you stick with a one dev method you do not need Potassium Bromide.

    I do my work both ways, so I have potassium bromide on hand as well it is one of the components for my sepia toning which I do a lot of.

    Quote Originally Posted by tkamiya View Post
    I did get a 5LBS bottle of Sodium Sulfite and Sodium Carbonate.

    I think the recipe calls for Sodium Bromide. NOT Potassium Bromide.... Did I mess this up?

  7. #47

    Join Date
    Oct 2009
    Location
    Central Florida, USA
    Shooter
    Multi Format
    Posts
    3,928
    I'll do the simple one first and see if I can manage that.

    Thank you.
    Develop, stop, fix.... wait.... where's my film?

  8. #48
    Bob Carnie's Avatar
    Join Date
    Apr 2004
    Location
    Toronto-Ontario
    Shooter
    Med. Format RF
    Posts
    4,676
    Images
    14
    Just don't zzapp yourself, water and electricity same room,,, hmmmm
    Quote Originally Posted by tkamiya View Post
    I'll do the simple one first and see if I can manage that.

    Thank you.

  9. #49

    Join Date
    Oct 2009
    Location
    Central Florida, USA
    Shooter
    Multi Format
    Posts
    3,928
    I wanted to 'play' today so I tried this with what I had.... the end result was: totally black print!

    I guess my second exposure was way too aggressive....
    Develop, stop, fix.... wait.... where's my film?

  10. #50
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    23,191
    Images
    65
    Too much light too early in the development phase.

    PE

Page 5 of 7 FirstFirst 1234567 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin