{"id":9747,"date":"2013-06-08T20:09:26","date_gmt":"2013-06-09T02:09:26","guid":{"rendered":"http:\/\/jbhphoto.com\/blog\/?p=9747"},"modified":"2018-08-22T12:15:03","modified_gmt":"2018-08-22T18:15:03","slug":"my-replacement-for-zone-vi-print-film-fixer","status":"publish","type":"post","link":"https:\/\/www.jbhphoto.com\/blog\/2013\/06\/08\/my-replacement-for-zone-vi-print-film-fixer\/","title":{"rendered":"MY REPLACEMENT FOR ZONE VI PRINT &#038; FILM FIXER"},"content":{"rendered":"<h4 style=\"text-align: justify;\"><a href=\"http:\/\/jbhphoto.com\/blog\/2013\/06\/08\/my-replacement-for-zone-vi-print-film-fixer\/zoneviclosed03\/\" rel=\"attachment wp-att-9772\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-9772 size-full\" src=\"http:\/\/jbhphoto.com\/blog\/wp-content\/uploads\/2013\/06\/ZoneVIClosed03.jpg\" alt=\"ZONE VI PRINT &amp; FILM FIXER\" width=\"264\" height=\"439\" srcset=\"https:\/\/www.jbhphoto.com\/blog\/wp-content\/uploads\/2013\/06\/ZoneVIClosed03.jpg 264w, https:\/\/www.jbhphoto.com\/blog\/wp-content\/uploads\/2013\/06\/ZoneVIClosed03-90x150.jpg 90w\" sizes=\"auto, (max-width: 264px) 100vw, 264px\" \/><\/a><strong>I had written earlier about the demise of Zone VI chemicals and how it has now become necessary to mix our own chemistry from raw supplies.\u00a0 Take a look at the previous post titled, \u201c<span style=\"text-decoration: underline;\"><a title=\"Fixer\" href=\"http:\/\/jbhphoto.com\/blog\/2012\/08\/26\/rolling-your-own-fixer\/\" target=\"_blank\">ROLLING YOUR OWN FIXER<\/a><\/span>.\u201d\u00a0 Since that post I have done quite a bit of research and testing.\u00a0 I am convinced that the fixer formula we chose is not exactly a direct replacement for the old reliable Zone VI product.\u00a0 Not that what we have been using is not a good fixer, it just is not the same.\u00a0 Fred always said, \u201cDifferent is not the same.\u201d<\/p>\n<p>I have mixed up several concoctions, but have always come back to the Looten Acid Fixer for its simplicity and close match of pH.\u00a0 I kept bypassing some of the more well known formulas for some reason, possibly because everyone says they have a very unpleasant odor.\u00a0 I don\u2019t believe any could be any worse than the Looten Acid Fixer we have been using. . . this stuff will take the hair out of your nose.<\/p>\n<p>I want to use an acid fixer for paper, because that is what I have used for years.\u00a0 All I wanted to do was find a 100% replacement for the Zone VI Fixer I have used for as long as I can remember.\u00a0 Zone VI Fixer was stable and it had little to no odor.\u00a0\u00a0 I have searched all over and have never found the exact published formula used by Zone VI. \u00a0<\/p>\n<p>I looked through all of the old Zone VI Newsletters and finally resorted to watching the Picker videos.\u00a0 Finally in the printing video Fred talks about his fixer being Kodak F-6.\u00a0 The only problem is that the Zone VI Fixer I have used for years always came in a single bag as dry chemical.\u00a0 If you check the formula for F-6 you will find it contains 28% Acetic Acid.\u00a0 I am no chemist, but as far as I know, 28% Acetic Acid only comes in liquid form.\u00a0 Plus, F-6 is a hardening fixer.\u00a0\u00a0 I have no reason to believe that Zone VI is a hardening fixer, let alone all instructions for F-6 say that the hardener, Potassium Alum, must be dissolved separately and added after all other ingredients have been completely dissolved.\u00a0 Again, the Zone VI Fixer came in one bag containing only dry chemical.\u00a0 So, I really do not believe that F-6 is the correct formula for what was sold as Zone VI Fixer.<\/p>\n<p>There are a lot of guesses, but I do not want a guess.\u00a0\u00a0 I measured the pH of Zone VI Fixer to be 5.5.\u00a0 None of the other concoctions that I have tried matched this pH, nor did they lack a strong odor.\u00a0 My original choice of Looten Acid Fixer had the closest pH coming in at 5.0, but has a strong odor, where the Zone VI Fixer has little odor at all.\u00a0 I still found myself going in circles.<a href=\"http:\/\/jbhphoto.com\/blog\/2013\/06\/08\/my-replacement-for-zone-vi-print-film-fixer\/lastznvifix01\/\" rel=\"attachment wp-att-9768\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-9768\" src=\"http:\/\/jbhphoto.com\/blog\/wp-content\/uploads\/2013\/06\/LastZnVIFix01.jpg\" alt=\"ZONE VI PRINT &amp; FILM FIXER\" width=\"223\" height=\"302\" srcset=\"https:\/\/www.jbhphoto.com\/blog\/wp-content\/uploads\/2013\/06\/LastZnVIFix01.jpg 319w, https:\/\/www.jbhphoto.com\/blog\/wp-content\/uploads\/2013\/06\/LastZnVIFix01-110x150.jpg 110w\" sizes=\"auto, (max-width: 223px) 100vw, 223px\" \/><\/a><\/p>\n<p>I finally got tired of having to run the vent fan on high to get away from the smell.\u00a0 Time to put on the apron, roll up the sleeves, and do more research.\u00a0 This time I decided to investigate the Kodak F-24 formula.\u00a0\u00a0 Why I bypassed this one before is beyond me, but I did, and it was a mistake.\u00a0 There is an alternative mixture that is suppose to be &#8216;low-odor&#8217; that substitutes Citric Acid for the Sodium Bisulfite of the original Kodak formula.\u00a0 This mixture still had a very strong smell.\u00a0 So much for the alternative, low-odor mixture!<\/p>\n<p>Next, I mixed up a two liter batch of the original F-24 formula, and surprise. . . it smells just like Zone VI Fixer.\u00a0 Next to no odor at all.\u00a0 I measured the pH. . . well whaddya know. . . it was exactly 5.5, just like Zone VI.\u00a0 Next I needed a stability test.\u00a0 I put two liters of F-24 in a four liter jug and let it set for a week.\u00a0 No change!\u00a0 That does it for me.\u00a0 So far as I am concerned, there is no difference.<\/p>\n<p>Wow!\u00a0 Have I solved the great mystery?\u00a0 Could it be that Zone VI Fixer is nothing more than Kodak F-24?\u00a0 I have changed our <span style=\"text-decoration: underline;\"><a title=\"Formulas\" href=\"https:\/\/www.jbhphoto.com\/blog\/formulas-updated-07142015\" target=\"_blank\">FORMULAS AREA<\/a><\/span> to reflect the formula for F-24 Fixer since it is now our chosen formula for paper.\u00a0 Note, that the only difference in the new formula is the addition of 10 grams of Sodium Sulfite per liter to the original Looten Acid Fixer formula.\u00a0 Not that difficult, but it does make a difference.\u00a0 Even if F-24 is not the exact same formula as Zone VI, it is plenty close enough for me.\u00a0 I will add that Gordon Hutchings also recommends F-24 for film and paper in \u201cThe Book Of Pyro.\u201d\u00a0\u00a0 So, now you know what I have learned about fixer. \u00a0<\/p>\n<p>There is one more thing to be aware of; be very careful with the temperature of the water when mixing Sodium Thiosulfate.\u00a0 The most common Sodium Thiosulfate is the Pentahydrate (crystalline type) which requires 240 grams per liter.\u00a0 You need water at about 100-125\u00b0F, because it is extremely endothermic and will rapidly cool the water as it dissolves.\u00a0 This I knew from experience.\u00a0 What I didn\u2019t know is that Sodium Thiosulfate Anhydrous (fine grain like table salt), which requires 152 grams per liter, should never be mixed in water above 90\u00b0F, because it will decompose and form a precipitant.\u00a0\u00a0 Just so you know, if using Sodium Thiosulfate Pentahydrate (large crystals) use hot water.\u00a0 If you are using the Anhydrous (fine grain) type, mix at about 80-85\u00b0F.<\/p>\n<p>CASE CLOSED. . . at least for me.\u00a0 I have found what I was looking for.\u00a0 If you were a Zone VI Fixer user and are looking for a suitable, easy replacement, this should work just fine.\u00a0 Now, back to making photographs. . . and. . . I can turn that vent fan down to low again!<\/strong><\/h4>\n<h4><strong>JB<\/p>\n<h4><em><strong><span style=\"text-decoration: underline;\">Kodak F-24 <\/span><\/p>\n<ul>\n<li><em><strong>Water (at about 125<strong>\u00b0<\/strong>F)&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;750.0 ml <\/strong><\/em><\/li>\n<li><em><strong>Sodium thiosulfate, crystalline&#8230;&#8230;&#8230;240.0 grams <\/strong><\/em><\/li>\n<li><em><strong>Sodium sulfite, desiccated&#8230;&#8230;&#8230;&#8230;&#8230;10.0 grams <\/strong><\/em><\/li>\n<li><em><strong>Sodium Bisulfite&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..25.0 grams <\/strong><\/em><\/li>\n<li><em><strong>Water to make&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;1.0 liter<\/strong><\/em><\/li>\n<\/ul>\n<h5 style=\"text-align: justify;\"><em><span style=\"text-decoration: underline;\">Note<\/span>:\u00a0 If anhydrous thiosulfate is used, the water temperature should not be over 90\u00b0F (80-85\u00b0F) to prevent decomposition.<strong><br \/>\n<\/strong><\/em><\/h5>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I had written earlier about the demise of Zone VI chemicals and how it has now become necessary to mix our own chemistry from raw supplies.\u00a0 Take a look at the previous post titled, \u201cROLLING YOUR OWN FIXER.\u201d\u00a0 Since that post I have done quite a bit of research and testing.\u00a0 I am convinced thatContinue reading &rarr;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[5,7,12,9],"tags":[33,16,17,89,18,55],"class_list":["post-9747","post","type-post","status-publish","format-standard","hentry","category-darkroom","category-formulas","category-how-to","category-photography","tag-darkroom-formulas","tag-film-photography","tag-fine-art-photography","tag-fixer","tag-jb-susan-harlin","tag-zone-vi","no-thumb"],"jetpack_publicize_connections":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ZONE VI PRINT &amp; FILM FIXER FORMULA<\/title>\n<meta name=\"description\" content=\"Could it be that Zone VI Fixer is nothing more than Kodak F-24? 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