In photography what is used as a fixing agent?
Sodium Theosulfate AKA Hypo is one form of fixing agent
While I was in photography class in high school, we used to go into the dark room and put pennies in the fixing agent trays. The copper would attract the silver that was left behind in the trays due to the developing process. The longer you left the copper in the tray, the more silver would be attracted to it. Works with other metals as well. Hope this helps.
The idea of permanently capturing an image on a substrate was thought of by Thomas Wedgwood in England, but his early attempts used silver nitrate without a fixing agent, meaning the images could not leave darkened rooms. The first known photograph taken by a camera is credited to French inventor Joseph Nicéphore Niépce, who in 1826 successfully captured a permanent image using a camera obscura.
fixing would be used as a verb. It would say something like: I am fixing the computer right now. Fixing: She was fixing to buy a new car, but was stopped by her husband. The teacher found that fixing each students mistakes can be a tedious job. The kids discovered some unique rocks while fixing their bikes. We are fixing to go to the mall. Would you like to go with us?