Asked by Andy Blackwell Uncategorized
How do you dissolve flexible collodion?
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Asked in Medical Supplies
What are the use of salicylic acid camphor and castor oil in the preparation of collodion?
Asked in Inventions
What is a collodion wet plate?
The Wet Collodion process was invented in 1851 by an Englishman named Frederick Scott Archer. It was an answer to Talbot's paper negative, the Calotype (1839), and the Daguerreotype (1839) from Louis Daguerre (a silver coated copper plate fumed with iodine and bromine and developed over hot mercury). The paper negative printed on Salt paper was "soft" but reproducible and the Daguerreotype was sharp and highly detailed, but it was a "one-off" and not reproducible. The Wet Collodion process produced a sharp, highly detailed negative and it was also reproducible - printed on Albumen and Salt paper. The steps of making a Wet Collodion image: 1. Cut a piece of glass and de-burr or de-sharpen the edges 2. Clean the glass very well. 3. Flow Collodion onto the plate (this Collodion contains two salts; an iodide and bromide. It also has additional alcohol and ether. 4. Sensitize the plate in silver nitrate for 3 - 5 minutes. 5. Expose the plate in the camera. 6. Develop the plate with an iron base developer - this developer contains distilled water, alcohol, acetic acid and iron. 7. Fix the image in KCN or Sodium Thiosulfate. 8. Varnish the image with Gum Sandarac, alcohol and lavender oil. 9. Let the varnish cure and et voile! A Wet Plate Collodion image. Post Script: The Wet Collodion process can produce both Negatives and Direct Positives. The process is basically the same.
Asked in Authors, Poets, and Playwrights
What has the author Henry Oscar Klein written?
Henry Oscar Klein has written: 'The applications of collodion emulsion to three-colour photography, process work, isochromatic photography and spectrographic work' 'The three-colour process - a step child' 'Photography of magnetic fields' 'A glimpse at some Continental schools and studios' 'The present position of collodion emulsion' 'Collodion emulsion and its applications to various photographic and photo-mechanical purposes, with special reference to trichromatic process work' 'About trichromatic portraiture'
Asked in Adjectives and Articles
What is the comparative adjective and superlative adjective of flexible?
Asked in Chemistry
Why aniline dissolve in alcohol but not dissolve in water?
Asked in Technology
What are the products of Flexible Circuit Technologies?
Asked in Makeup
Is sinful colors one of the best celling nail polish of America?
It is, but it shouldn't be. It sells as well as it does because it's only a couple of dollars a bottle, so you can afford to buy a bottle of it for a special occasion and throw it in the back of the nail polish shelf after you use it. You're not going to do that with OPI at $8.50 per bottle. There are two problems with it: it's not very good, for one. You've got to put many coats of it on your nails to get it to work. And it doesn't seem to hold up as well as more expensive polishes, but for two bucks what do you expect? The real problem is what's in it: collodion and dibutyl phthalate (DBP). ALL nail polish, no matter where it's from, contains nitrocellulose, which is the plastic that stays on your nails after the solvents dry. You can buy it two ways: as a powder which you dissolve in ethyl acetate, or already dissolved in ethyl acetate and ether, which is called collodion. Collodion is a health hazard because of the ether. Cheap polishes like Sinful Colors use collodion because it reduces the cost of manufacturing the product--you don't have to wait for the nitrocellulose to dissolve before adding the rest of the ingredients. The other is dibutyl phthalate, which is suspected of being both an endocrine system disruptor (screws up your hormone system) and a teratogen (causes birth defects). No one else puts DBP in their nail polish, and for this reason alone I wouldn't recommend it. Sally Beauty stores carry "Finger Paints" brand, which is also an inexpensive polish but it's DBP-free and contains nitrocellulose rather than collodion. I would get that. I tried a bottle and it works okay.