I'm surprised nobody has mentioned this, so I'll add it to the archive.
When I mix up 130 stock solution I omit the KBr. This gives me the choice of using KBr or Benzotriazole when I dilute to a working solution, depending on the desired tonality. I normally use 15ml of 1% Benzo solution per liter of stock for a colder tone; this is essentially Evan's recipe (post 72) but I don't bother changing the sodium carbonate, I always use the standard recipe's 78g.
With KBr the print color is very close to that of Dektol/D-72, at least for Multigrade IV, Fomabrom Variant 111, and Adox MCC110. Benzotriazole gives a colder image.
Earlier this week I inadvertently omitted the Benzo from a fresh working solution and didn't realize it until the next day when I exposed a test strip on MCC110 and cut it in half. The first half got the non-Benzo developer, then I added the Benzo solution and developed the second half. The non-Benzo version was only slightly warmer, but the difference was very subtle and only noticeable in this side-by-side comparison. I'd printed for the entire previous day without spotting this oversight!
Last edited by Steve Goldstein; 12-28-2012 at 05:54 PM. Click to view previous post history.