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Article: 12/15 Developer

  1. #1
    MurrayMinchin's Avatar
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    12/15 Developer

    I loved the look of Ansco 120 developer, and felt Ansco 130 had too much snap and sizzle for my images, but wanted the depth, richness, and keeping qualities of Glycin...so I came up with what I call;

    --------------------------12/15 Developer

    750 ml...............................Hot-ish Water
    12 grams............................Metol
    36 grams............................Sodium Sulfite (anhydrous)
    30 grams............................Sodium Carbonate (anhydrous)
    45 ml.................................Potassium Bromide (10% solution)
    15 grams............................Glycin
    Water to make 1 litre of Stock Solution (S.S.)
    Add 15 ml of 2% Benzotriazole per litre of S.S.

    12/15 S.S. properly contained will easily last a year.
    Dilute 1:3 for Working Solution (W.S.)
    Use at 70 to 72 degrees F...warm Glycin is happy Glycin.

    ----------------------------Developing Time

    Because I keep 12/15 W.S. for up to several months...depending how much it gets used...and because I want consistant print results over time I use the Emergence Time (E.T.) of the image in the developer, multiplied by a Development Factor (D.F.) to find development times.

    This developer has a slow image E.T. so I use the E.T. of the negatives clear edge multiplied by a D.F. of 4.5 for normal development. An E.T. of 40 seconds multiplied by a D.F. of 4.5 equals a developing time of 3 minutes. When the E.T. gets to about 48 seconds I toss it because developing times start getting too long for my tastes.

    Applying a larger D.F. doesn't result in an overall darkening of the image, but has proportionally more effect on the darker print values...a quality which I believe is unique to Glycin.

    This developer, at least with Ilford Multigrade IV FB glossy paper, and toned in selenium, gives a beautiful richness of tone and colour when viewed under tungsten light.

    A word of warning - not much of anything happens in the first minute, a little in the second, but it really picks up speed in the third.

    Murray

  2. #2

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    i had similar feelings about Ansco 120 and 130. Minchin's 12/15 works exactly as advertised. beautiful stuff. it's become my standard solution. thank you Murry Minchin.



 

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