Kodak D-76d

D-76d is a buffered version of D-76 which provides almost identical result when used undiluted with slow to medium speed films. Slight deviation may be observed if used diluted or with higher speed films. Packaged D-76 products are considered to be much closer to this composition than original D-76 of 1927.

 

The "optional replenisher" is a new replenishing method suggested by Kodak, as recommended in their publication O-3. They instruct to make the "optional replenisher" by mixing 5 parts of D-76 and 1 part of D-76R, both packaged versions sold in Kodak label. Based on MSDS information, it is assumed that packaged D-76 is practically identical to D-76d, and D-76R is unchanged from its original form. Based on this assumption, the composition of "optional replenisher" was obtained as shown above. To best of my knowledge, no direct formula for the "optional replenisher" was published in any official Kodak publication.

This "optional replenisher" is used at a rate of 70 ml per 80 sq. in. of film. This replenishing method is less economical than original use of D-76R, but it provides excellent image quality with consistency, even in small scale processing. For more details, consult Kodak publication O-3.

(Suzuki, 2003)