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The exposure time for wet glass collodion Photography can vary depending on factors such as lighting conditions, sensitivity of the emulsion, and the specific equipment being used. Typically, exposure times can range from a few seconds to several minutes. It is recommended to experiment with different exposure times to achieve the desired results.
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List 3 basic liquids that do not wet a glass?
Mercury: Due to its high surface tension, mercury does not wet glass and forms droplets on its surface. Carbon tetrachloride: This liquid has low surface tension, which causes it to bead up on glass rather than spread out. Liquid bromine: Like mercury, liquid bromine does not wet glass due to its high surface tension property.
Why do drinking glasses slide across the counter when they are wet?
When a drinking glass is wet, the layer of water underneath creates less friction between the glass and the counter, making it easier for the glass to slide. This reduced friction allows the glass to move more freely across the surface, especially if there are no grips or stops to prevent it from sliding.
Why table salt becomes wet on exposure to air?
Because salt is hygroscopic - can easily absorb or adsorb water.
Why does the hot glass of a kerosene lamp cracks when wet with water?
The glass of a kerosene lamp while glowing is hot. When water falls on it, there is a sudden change in temperature, which causes the glass to break.
Can mercury wet a substance?
Mercury is a metal unlike water which have hydrogen bonding. Mercury does not wet most substances, because of its high cohesion and low adhesion to the glass mercury will not wet glass. Cohesion, along with adhesion(attraction between unlike molecules), can help explain mercury phenomena. Mercury has a surface energy over 6 times greater than that of water so there is a much greater attractive force between the atoms of mercury than between the molecules of water, so mercury does not wet glass.
What is the wet plate procces by frederick scott archer?
the collodion was carefully poured onto a perfectly clean glass plate. when the ether had almost evaporated, the plate was plunged into a bath of silver nitrate to sensitise it. the still wet plate was put in a plate holder and was exposed in the camera. after the exposure the plate was developed fixed and washed.
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.
What is a 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.
How long did a photo take in 1861?
A technique on the rise in the early 1860's, wet process Collodion negatives could be exposed as quickly as a few seconds. That's not to say there weren't some longer-exposure Daguerrotype and other processes still in use, but by this point they were well into their decline.
What is the difference between a wet plate camera and a dry plate camera?
A plate camera exposes to focussed light a glass plate coated with a solution of silver salts. In the early days the formula for the solution was such that the coating had to be fresh - not necessarily actually wet (which would have run and made some weird effects) but absolutely new. Fox-Talbot and his emulators travelled with a darkroom tent and coated their plates on site. Once the chemical process had been refined, it became possible to coat plates at home and take them out in a light-proof box because the coating remained active for much longer - days instead of minutes. celluloid film came much later. People who need immense detail in their pictures still use glass plates, but wet plates, unless somebody wants to try the process for fun, are long gone. The statement about the wet plate process is not accurate. I am a modern wet plate artist. The process is called WET PLATE COLLODION because the Collodion HAS TO STAY WET for the proces to work,if it's not wet, it looses sensitivity and will not produce an image. Regards, Quinn Jacobson www.wetplate.com
Who improved the camera?
First photo-1827 Joseph Nicephore Niépce produces the first successful picture over an eight hour exposure time. 1837 Daguerretype In 1837 Daguerre creates his first Photo on a copper plate coated with iodide of silver. 1840 Calotype Talbot sensitized paper to light with a silver salt solution. He then exposed the paper to light. In 1851, Frederick Scoff Archer,Glass Negatives & The Collodion Wet Plate. Ambrotype - 1850s a faster and less expensive photographic process. The tintype photography process was patented in 1856 by Hamilton Smith. 1879- wet plate photography,Frederick scott archer. 1861 -The first color photograph taken by photographer Thomas Sutton. Maxwell discovered that color photographs could be formed using red, green, and blue filters. 1871- dry plate photography English Inventor RL Maddox, seeking to develop a less cumbersome process than the wet-plate collodion method, experiments successfully with silver bromide and gelatin to produce a dry plate.
Why does alcohol wet glass?
Alcohol wets glass due to its low surface tension and high polarity. The hydroxyl group in alcohol molecules interacts with the polar surface of the glass, leading to a stronger attraction between the alcohol and the glass compared to the attraction between the glass molecules themselves. This causes the alcohol to spread out and form a thin film on the glass surface, rather than bead up like non-polar liquids such as oil.
What liquid is not wet?
The "wetting" that happens when an object is immersed in a liquid depends on the surface energy of the object and the capilary forces in action on the surface of the liquid. for example mercury will not "wet" glass but water can wet the same glass.
Make a wine glass sing?
you need a wine glass for starters, you wet your finger, and you circle the wine glass with your finger, after the first circle. youll heall a faint note, wet your finger again and perform the circle once again, the wine glass SINGS
What happens if pewter gets wet?
If pewter gets wet, it may develop water stains or tarnish. It is important to dry pewter thoroughly after it gets wet to prevent any damage. Additionally, prolonged exposure to water could potentially cause corrosion on the surface of pewter over time.
What is glass wool soaked in water?
Wet thermal insulation.
Is glass slippery?
If it is wet then yes because it has no grip. It is flat.
