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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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PHOTOCHEMISTRY (COLOR) sa PHOTOGRAPHIC FILM DEVELOPER (COLOR) sa PHOTOGRAPHIC PRINT DEVELOPER (COLOR) xx PHOTOCHEMISTRY xx PHOTOGRAPHY (COLOR) An informal roundup of what's new in color chemistry. Photochemistry VII. Color reversal processes. Part 2. Photochemistry VII. Color reversal processes. Part 3. Color slide film sensitometry and effects of push processing. Photochemical compendium. Part 8. The chemistry of color film processing. Tip on a quick and economical remedy for darkroom workers who are allergic to color developers. Useful tips in the proper solution preparation of Cibachrome A-II P-30 chemistry. Use of alcohols in color developers is discussed. Tip on adjusting the pH balance of used C-41 bleach. General chemical procedures for improving the results of E-6 chemistries. Formulas for processing older Type B (Agfa) color papers. Test results from using Arga Color Chemistry Extender are reported. Up to thirty-six 8x10 EP-2 color prints from one quart are reported. Some tips. Combination bleach/fix formula for both color negative films and color negative print papers. Tip on preventing scum from forming on E-6 reversal baths. Tip on using sodium or potassium thiocyanate in E-6 developers. Bleaches and reducers. Investigating electrochemical reactions. Looks at both conventional and nonconventional bleaches and bleach/fixers in terms of the electrochemistry that makes these solutions function. Color bleaches and bleach/fixers. Ferric-EDTA and persulfate/quinone. Formulas and how to use. Cost/benefits of mixing your own color negative chemistry from raw materials. Working pH level of color bleach, color bleach/fix and color developer is discussed. Testing persulfate quinone bleach. The formula is included. Kodak's reformulated C-41 process bleach (incorporating ferric ammonium 1,3-PDTA) is discussed. Reasons for an allergic reaction to EP-2 type color negative print developer and possible cures. Tip on lowering the pH value of color negative film developer. Tip on mixing your own color negative chemistry which is similar to Unicolor K-2 chemistry. How to monitor the aeration process of ferric-EDTA/PDTA bleaches to determine when reversion is complete. Faster color printing. Mix-and-match papers/developers. User test of a new Jobo product called "Photocolor Printmaster", an EP-2 compatible color negative print developer and bleach/fix that will work in 1 minute. Role of stabilizers in color chemistry. EP-2 formula allows you to process color prints in two minutes at temperatures between 80- and 82-degrees. Differences and purpose of the "starter" solutions for C-41 and E-6 color developers is explained. Tip on substituting chelated iron compound for ferric-EDTA used in color bleach and bleach/fix solutions. Cibachrome contrast control using "Dye Chrome" chemistry is tested and explained. Color coupler and developer formulas for selective color application to black-and-white prints. E-4 prehardener and neutralizer formulas allow Ektachrome Infrared Type 2336 film to be processed in E-6 chemistry at higher temperatures. Role of "developer starter" in color processing chemicals is explained. Lack of a stop bath in present-day reversal color developers is explained. Tip on chemical substitutes for Ferric EDTA in photographic applications. Copper bleach and copper bleach/fix formulas. Annual color chemistry buying guide. How to choose color chemistry. Purity pays. Color chemicals must be protected from chemical contamination. A look at the problem and tips on avoiding contamination. Solution of Epsom Salts and water will "harden" Cibachrome prints. Tips on using Kodak's Ektaprint 300 color print developer. Comparison of two dual-use color processing chemistries designed to process both color negative films and Type C prints. Looks at Unicolor "Total Color" and Photocolor II. Comparison test of four leading brands of two-step color print processing kits. How to choose a color "soup". A buyer's guide to color chemistry for film and prints. Tips on using the "Hobby-Pacs" from Kodak to process color film and color prints. How to "stretch" Beseler Two-Step color print chemistry. Get up to 24 8x10 prints from one pint of chemistry. A user prepared color negative developer and processing procedure for Kodacolor II and Vericolor II films. Semi-official Kodak C-41 process for processing Kodacolor II, Vericolor II and Kodacolor 400 films. Includes formulas and time/temperature chart. E-6 formulas for mix-your-own processing of Ektachrome film. Photochemistry V. Color negative chemistry. Part 1. Cibichrome II alternate chemistry. Formulas for mixing up your own chemistry to process Cibichrome II professional or Cibichrome-A II amateur materials. Photochemistry V. Color negative chemistry. Part 2. Formulas for economical one-shot developing of 5293/5247 (ECN-2 process) color negative films produced for professional motion picture making. Includes tips on developing five different films. Photochemistry VI. Color negative print chemistry. Part 1. Photochemistry VI. Color negative print chemistry. Part 2. Photochemistry VII. Color reversal processes. Part 1. Computer program written in BASIC calculates the amount of replenishment to add to E-6 color slide chemicals based on the number of rolls or sheets of various size film which have been processed. Use several labeled plastic pill containers to hold the various color chemicals needed when using daylight drums. A review of the latest available color processing chemistry. User test of Photocolor II color processing chemicals that allow you to process any type II C-41 film (Kodacolor II, Fujicolor II, Sakucolor, etc.) How to choose a color negative chemistry. Seven different kits are tested on Process C-41 film. Brands tested are: Kodak, Unicolor, Beseler, Photocolor, Paterson, and Opticolor. Color print paper kits compared. Choosing the chemistry for processing color print papers. Seven different chemistries compared. Brand names include Kodak, Beseler, Unicolor, Paracolor, and Photocolor. Which kit to process your own E-6 Ektachrome films. Comparison test of the Kodak, Beseler, Unicolor, and Photocolor E-6 kits. A look at "Color by Beseler" which can process Kodak Ektacolor 37 RC paper, without critical temprature control, and produce prints very quickly. Tips on its use. Chemistry to go. An evaluation of the new liquid C-41 developers (Kodak C-41, Unicolor K2, Beseler CN-2, Photocolor II, Parcolor). Tip: Use a fish tank air pump to aerate Ektachrome E-6 bleach solution. How to save underexposed slides by using chemical color reducers. Tips on using Aeroprint black and white and color spray chemicals. A fresh look at Cibachrome Type-A and P-12 chemicals. A look at Unicolor RP-1000 for processing Ektachrome 2203 reversal paper. Tips and precautions to take when handling color chemicals. Tips on using Kodak's new easy-to-mix all-liquid E-6 color film processing kit. How to tell when your color chemicals and printing papers go bad, and how to make them last longer. | |||||||||
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