Modifying Dektol/D-72 to Ansco 130?

Discussion in 'B&W: Film, Paper, Chemistry' started by aarontalcott, Mar 26, 2013.

  1. aarontalcott

    aarontalcott Member

    Messages:
    10
    Joined:
    Jan 31, 2013
    Location:
    Livingston,
    Shooter:
    Multi Format
    I've been working out the cost of mixing my own 130 from bulk chemicals to see if I could get it down near the cost of Dektol. Ordering larger quantities of the chemicals from artcraftchemicals.com, it looks like 130 would come in at around $4/lt of stock--a lot better than the $13.25/lt the Formulary charges, but still a lot more than Dektol's ~$1.50/lt., especially considering the latter is generally used at 1+2 instead of 130's 1+1.

    I notice, however, that the formulas for D-72 and 130 are very similar except for the addition of glycin in the 130:

    To make 1 lt. stock:

    [TABLE="width: 500"]


    D-72
    Ansco 130

    Metol
    3g
    2.2g

    Sodium Sulfite
    45g
    50g

    Hydroquinone
    12g
    11g

    Sodium carbonate (mono)
    80g
    78g

    Potassium bromide (anhy)
    2g
    5.5g

    Glycin

    11g




    [/TABLE]

    Is it possible to mix dektol stock and add the additional potassium bromide and glycin? How practically significant are the variations in the other chemicals? 11g of glycin costs around $0.11, so this would bring the total cost per liter down to well under $2.
     
  2. Gerald C Koch

    Gerald C Koch Member

    Messages:
    6,246
    Joined:
    Jul 12, 2010
    Location:
    Southern USA
    Shooter:
    Multi Format
  3. jnanian

    jnanian Advertiser Advertiser

    Messages:
    19,995
    Joined:
    Jun 21, 2003
    Location:
    local
    Shooter:
    Multi Format
    the place to get glycin is the photographer's formulary ... the problem with
    why don't you just mix up some ansco 130
    and leave it as a stock solution and use it when you want ...
    and mix up some dektol and use that ...

    ansco 130 lasts for about a year, even longer in a undilute stock solution ...
    i am still using some i mixed up december 2011 and it is doing just fine.
     
  4. Doremus Scudder

    Doremus Scudder Member

    Messages:
    1,276
    Joined:
    Sep 10, 2002
    Location:
    Oregon and Austria
    Shooter:
    4x5 Format
    I can't see any reason why you can't try it. The only significant difference is the amount of Metol in the D-72 formula being roughly 25% more. Whether that would have any adverse effect is the question. It may make the D-72+Glycin developer a bit more contrasty (but not much, I would think).

    Why not mix some up and report back?

    Best,

    Doremus


    www.DoremusScudder.com