tag:blogger.com,1999:blog-6450920689300280850.post8112657467212756898..comments2022-09-28T22:40:16.476-07:00Comments on Ascorbate-developers: TCB, discussion and more pictures.ErikPhttp://www.blogger.com/profile/13567297097871167752noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-6450920689300280850.post-9454627623423088272011-06-16T08:02:29.251-07:002011-06-16T08:02:29.251-07:00A quick comment about longevity with vit-c develop...A quick comment about longevity with vit-c developers. I noticed an interesting trend ... my data shows that the shelf life of the developer is affected more by exposure to oxygen than time alone (I see this with PCB and TCB). While TCB and PCB work I now favour one-shot developers, specifically PCM. It is slightly more expensive than PCB but it's at the lower threshold of ingredients while being one-shot to ensure consistency. Now that you have Phenidone, I'm curious to see your results with PCM ... I've tested it on a variety of films with very good results.Michael Madiohttps://www.blogger.com/profile/09930109209540776796noreply@blogger.comtag:blogger.com,1999:blog-6450920689300280850.post-86646218208173714032011-06-16T07:44:15.340-07:002011-06-16T07:44:15.340-07:00Good overview. If I was limited to home-brew deve...Good overview. If I was limited to home-brew developers using readily available ingredients this would be my first choice, a better option than Caffenol as there are no questionable ingredients (e.g. coffee). Now the real fun begins ... time to break out the Phenidone and see what it can do. Looking at the Phenidone recipes, particularly PCM, I am still amazed at how little ingredients are needed to process film. With Caffenol, just the amounts of carbonate and vitamin-c required make me think twice about using it, then adding instant coffee makes it even less economical. I realize economy isn't the only factor but if you can get better results with less cost, why not?Michael Madiohttps://www.blogger.com/profile/09930109209540776796noreply@blogger.comtag:blogger.com,1999:blog-6450920689300280850.post-69298154583160158232011-06-14T06:26:04.883-07:002011-06-14T06:26:04.883-07:00I learned the hard way that p-aminophenol will oxi...I learned the hard way that p-aminophenol will oxidize rapidly without any preservative. The tell-tale sign is the colour of the mix. If it turns a deep red then you most likely have too much oxidized p-aminophenol. When making parodinal the sulfite preserves so in this case you need ascorbate. 2 hours semi-stand with the above recipe gives a +1 push with regular B&W film so you should get box speed with C-41. I will try with Kodak Gold 200 when I get a chance.Michael Madiohttps://www.blogger.com/profile/09930109209540776796noreply@blogger.com