tag:blogger.com,1999:blog-432844111261898163.post2034749103252709936..comments2022-12-01T01:56:54.136-05:00Comments on A Year On Film: Roll Reversal - A Safe AlternativeMektar Polypanhttp://www.blogger.com/profile/02241241783297021566noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-432844111261898163.post-40742564574251298922021-09-27T07:33:33.781-04:002021-09-27T07:33:33.781-04:00The sodium sulfite is for the clearing bath, and i...The sodium sulfite is for the clearing bath, and is optional. It could be the light source you're using, avoid using florescent, UV, and sunlight. For the re-exposure you need a bright light (tungsten or halogen light) 25-30 cm away from the light source for about 1 minute.... Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-40483721526338882612020-07-28T21:18:07.402-04:002020-07-28T21:18:07.402-04:00I am having this same problem with hp5 using ilfos...I am having this same problem with hp5 using ilfosol 3 as my developer. I follow the bleach process exactly and have the same problem, fixer causing the positive image to revert to a darker negative. Were you able to figure out a solution? Thanks.Anonymoushttps://www.blogger.com/profile/07066920418693709040noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-71512549617158490562019-10-22T12:52:12.464-04:002019-10-22T12:52:12.464-04:00Hello, I'm very interested in this project and...Hello, I'm very interested in this project and alternative way of making positives. I have some questions:<br />Other blogs suggest no to use sunlight for reexposing, have you done it on full strenght sun light?<br />How much rolls can be bleached with one liter of a solution?Vojtěch Dvořáknoreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-59838359034398356482019-03-04T10:38:53.835-05:002019-03-04T10:38:53.835-05:00Hallo!
I'm big fan of B/W reversal film. I use...Hallo!<br />I'm big fan of B/W reversal film. I use mostly SCALA or ORWO UN54+. This is "universal" film, usable as simple negative (100 ASA) or as reversal (125 ASA, may be is better 160 ASA). ADOX Silvermax is usable as reversal film too (practical is SCALA, too 160 ASA).Anonymoushttps://www.blogger.com/profile/08265358401605426775noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-51471745968693101802017-10-19T20:13:19.068-04:002017-10-19T20:13:19.068-04:00MellowStudentFury. You didn't manage to get th...MellowStudentFury. You didn't manage to get the desired result since there's one step more that is not mentioned in the post. I can't understand how it is that the first comment states that he or she managed to succeed without the additional step that requires Sodium sulfite, I know the guy from Portugal says he hasn't used it getting good results but remember his fomula is lemon-acid based, which is totaly different to a vinegar (I am not a chemic). Cheers!tcdphttps://www.blogger.com/profile/15931684686946895290noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-71320847721225212132017-10-18T00:15:56.813-04:002017-10-18T00:15:56.813-04:00This comment has been removed by the author.tcdphttps://www.blogger.com/profile/15931684686946895290noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-30701975391447386692017-04-06T09:06:24.309-04:002017-04-06T09:06:24.309-04:00I'd love to answer that question, however I...I'd love to answer that question, however I'm, unfortunately, in no possible way to answer that truthfully.. <br />I believe it does have to be 'hot' so to speak, as the person who developed this method found that you had to increase the temperature.. It seems a bit warm to me too, but if it works, it works.<br />Mektar Polypanhttps://www.blogger.com/profile/02241241783297021566noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-2336967025430593692017-03-16T05:15:23.385-04:002017-03-16T05:15:23.385-04:00I'm a fan of Polypan F and will try this thing...I'm a fan of Polypan F and will try this thing ASAP. Does the bleach bath really needs heating at 150°F for processing, or just for mixing it?LucMhttps://www.blogger.com/profile/17610105867095971646noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-54680132192125864532017-01-31T10:02:57.714-05:002017-01-31T10:02:57.714-05:00Absolutely you should be able to. I have seen it d...Absolutely you should be able to. I have seen it done with many different films by the guy who devised this type of reversal process..Mektar Polypanhttps://www.blogger.com/profile/02241241783297021566noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-6172712849303202302017-01-30T23:24:36.392-05:002017-01-30T23:24:36.392-05:00Is it possible to do this process to a negative bl...Is it possible to do this process to a negative black and white film, say Tri-X for example. I've been attempting to make a slide like positive on my negatives. So far I have come close, but not close enough as my scans still required to be negatives in order to be proper. I also have Kentmere 100 in my arsenal as well. Thanks!Kylenoreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-8738277709001882302017-01-14T14:26:54.131-05:002017-01-14T14:26:54.131-05:00Watch out! You are making highly corrosive paracet...Watch out! You are making highly corrosive paracetic acid when you mix peroxide and vinegar (acetic acid). This IS a harsh chemical. Do NOT use it without an acid gas respirator, forced ventilation, face guard, gloves, and plastic apron.DanSkorupkahttps://www.blogger.com/profile/12835898988805929899noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-64927002957702128772016-10-27T07:15:29.119-04:002016-10-27T07:15:29.119-04:00How long are you Exposing the film to light for?, ...How long are you Exposing the film to light for?, I tried the process with the Peroxide bleach. A positive was achieved during the second development, but quickly disappeared when I added the fixer. all that was left was a dark negative image. I used Ilford Pan 50 in D76 1+3 @ 15mins, Bleach for 6mins, Re-exposure was continuious (on both sides) for 10mins, The re-dev in D76 1+3, then Fixed in Agfa g333c.<br /><br />What do you think should I add more time to the re-exposure or dilute the developer and fix?<br />Mellowhttps://www.blogger.com/profile/02992649170129245935noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-35259872284791153692016-06-20T15:52:07.930-04:002016-06-20T15:52:07.930-04:00Andi, the reason that it might have tiny cracks on...Andi, the reason that it might have tiny cracks on the emulsion must not be from the caffenol itself, but because the bleach is not stable, if you haver pH paper strips around, check if the value is around 2, above that, hydrogen peoxide is unstable, that must be the reason for the blisters. Also, 3% is a very low concentration, and 150F is also too high temperature. What I use normally is a lower temperature, around 96F and a concentration of at least 5%. If you can only find 3% hydrogen peroxide, you can boil it according to the right percentage. Hydrogen peroxide decomposes at higher temperatures than the water boiling temperature. Again, try incresing the concentration of acetic acid (or vinegar) it seems too low... all bestRicardo Lucefecehttps://www.blogger.com/profile/02056881561837261690noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-21645992767580257782016-06-20T15:35:07.863-04:002016-06-20T15:35:07.863-04:00The first time I heard about this "recipe&quo...The first time I heard about this "recipe" was trough my own research in 2013, http://www.filmlabs.org/docs/citric-hydrogen-peroxide-bleach.pdf But maybe someone got to the same conclusion as I did :) The good thing is that many people are using it, and that's very positive, since it is a much safer version than the conventional potassium permanganate and potassium dichromate onesRicardo Lucefecehttps://www.blogger.com/profile/02056881561837261690noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-61599427592441322312015-07-13T10:09:27.236-04:002015-07-13T10:09:27.236-04:00No problem! I cannot believe how simple it really ...No problem! I cannot believe how simple it really is. I have yet to try it myself (personally) but as this has been done multiple times by the person who gave me the recipe, I would have to say it is a definite keeper! <br />Certainly beats using strong acid and harsh chemicals!Mektar Polypanhttps://www.blogger.com/profile/02241241783297021566noreply@blogger.comtag:blogger.com,1999:blog-432844111261898163.post-34884439108263235472015-06-23T00:18:40.277-04:002015-06-23T00:18:40.277-04:00Thanks a lot for sharing!! It worked unexpectedly ...Thanks a lot for sharing!! It worked unexpectedly well even if the emulition has tiny cracks all over the highlights in my case, probably due to using caffenol as a developper and a kodak gold color film. But either way, it's surprising and eve got some subtle color. <br />Chears!andihttps://www.blogger.com/profile/05863255752559628084noreply@blogger.com