2 bath processing with normal developers

At Barry Thornton's very informative web site (www.barrythornton.com) I read about the use of a simple 2 spoons of kodalk/liter 2nd bath which can be used with normal developers to get a kind of a two bath developer with your normal developer. Ansel Adams also talks about this in his book the negative which lays on my bedside cabinet. I have some experience with 2 bath developers, mostly emofin but also diafine. I was very satisfied with the result but I'm not always looking for their speed increasing. In fact I only use it with Tri-x for 800 asa and get good printable negatives with my condenser enlarger (focomat 1c). With slower films it is not always easy to keep the contrast normal and this 2nd bath sounds like the perfect solution. Has someone experience with this technique ? Probabely in combination with rodinal ? And where can I find a bit of kodalk ? I've found supliers of photographic products on internet but I'm afraid they are not interested in sending my about 100 g of kodalk. And what will the mailman say when he is delivering me a letter with powder ? They don't laugh with these jokes. Greetings

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