In summer, in addition to a wide range of clothes, a variety of silver jewelry is also one of the most favorite items for women. However, silver ornaments are easy to turn black. “Folk†has a variety of ways to make silver ornaments white and bright, and with a few simple steps, silverware can be completely renewed. Which works? We will help you check!
1, the experiment with toothpaste brush, like a new product
experiment procedure
Help your team member Xiao Zheng contribute a silver fish pendant, the front and back and the hollow have been black. The team member Xiao Ji squeezed a little toothpaste onto the pendant and then gently brushed it with a toothbrush. At the beginning, the pendant, the toothpaste and the toothbrush were glued together, and it was a little “grinding†in the hands of the Xiaoji. But slowly, Xiao Ji and Xiao Zheng found that the small fish pendant turned white! Subsequently, Xiaoji took the pendant and the toothbrush to the faucet and scoured it. The result was very pleasant!
Experimental result
After brushing with toothpaste, the small fish pendant becomes white and bright, especially after the toothpaste remaining in the hollowing out is finished, the pendant is completely new!
Experimental secret
Why toothpaste can easily make silverware become white and bright? Yu Xudong, a lecturer in the Department of Chemistry, College of Science, Hebei University of Science and Technology, explained that the blackening of the silver surface is due to the long-term chemical reaction of silver in the silver with the sulfur oxides in the air, which produces black silver sulfide spots, which are slowly diffused into pieces. Toothpaste containing an abrasive particulate, such as calcium carbonate, calcium bicarbonate, aluminum hydroxide, with a toothbrush dipped in toothpaste friction silver, silver sulfide film may be covered by a physical jewelry surface of the wipe action, thus making the jewelry look like new.
2, the experimental tin foil paper bag soaked, the effect is not big
experiment procedure
Xiao Zheng to a black silver foil was wrapped in a necklace, add a little salt, which is then carefully folded, sealed. At this time, Xiaoji took half a bowl of warm water. "I won't float on the water if I put it in? Will it work?" Looking at the tin foil bag in Xiao Zheng's hand, Xiao Ji said with a little worry. "Let's put it!" Xiao Zheng said, putting the foil bag into the warm water. The foil bag quickly sank into the bottom of the bowl.
After 10 minutes, Xiao Zheng took out the tin foil bag with a sly mood and gently opened it - what happened?
Experimental results
The salt in the foil bag has already inhaled the water and condensed into a ball. The necklace "cuffed" in it and it looked nothing. Xiao Zheng took out the necklace and carefully observed it. It really brightened, but the original black place was still dark.
Secret experiments
Why does the foil paper wrap the silver immersion so that it doesn't work? Yu Xudong said that silver foil is soaked in tin foil and salt. On the one hand, tin foil and salt do not react with silver sulfide. On the other hand, there is no such physical effect of rubbing, so it is impossible to remove the black substance of silver sulfide.
3, of the experiment paper wipe lipstick, only brighter white unchanged
experiment procedure
Xiao Ji took a lipstick and gently applied it to a piece of white paper, then placed another blackened silver necklace on it to rub it back and forth. After a few rubs, the paper was unfolded and it was found that although the necklace was not too white, it became a lot brighter, and the place where the lipstick was applied to the paper left a few deep black lines.
Will it be as long as the paper will rub, the silver chain will brighten? Subsequently, Xiao Zheng rubbed the necklace with a piece of paper that did not paint anything.
There was also a black line on the paper, but it was very light and the necklace did not change much.
Experimental result
Rubbing the silver with a lipstick-coated paper can brighten the silver, but the original blackened part is not completely white. It can only be said that this method has a certain effect.
Experimental secret
Lipstick can also make silver whitening? What is the principle? Yu Xudong said that the lipstick contains emulsifier and titanium dioxide. Titanium dioxide is a kind of fine particles. When wiping silver with lipstick, titanium dioxide acts as a friction agent and can remove the black material on the surface of the silver decoration. However, since the titanium dioxide particles are extremely fine, the effect of darkening is also limited.
Special reminder to keep dry when wearing silver
In addition to the above methods, "folk" also spreads the method of using alcohol scrubbing, applying correction fluid to silver jewelry, and using silver tea soaking in the night to make the silverware white and bright. Do they work? What is the scientific reason?
In this regard, Wang Yanqiu, experimental center of the College of Science, Hebei University of Science and Technology explained that the composition of alcohol is mainly ethanol, and does not contain granular abrasives. In principle, silver sulfide cannot be removed; overnight tea soaking without rubbing can not make silver white The correction fluid contains titanium dioxide, which is titanium dioxide. This material is granular, so it has a certain effect when it is wiped with a correction solution. However, the correction solution also contains toxic substances such as trichloroethane, methylcyclohexane and cyclohexane. The chemical composition will cause damage to the silverware, so it is not recommended. All of the above methods basically remove the black film on the surface of the silverware by friction, so that a certain amount of silver is wiped off more or less, and scratches are left on the surface of the silverware. Compared with these methods, the most scientific, reasonable and simple method is to use a toothbrush to wipe the surface with a toothpaste. The toothpaste is economical and non-toxic. The particles of the friction agent are extremely fine, and the toothbrush is soft, so that the scratch is treated. Lighter.
At the same time, Wang Yanqiu reminds everyone to pay attention to the following points when wearing silverware: First, do not wear in a strong acid environment; Second, do not wear it with other precious metal jewelry at the same time to avoid collision deformation or scratching; Third, keep the silverware dry, don't Wear swimming, do not approach hot springs and sea water; 4. Wipe it clean when not in use for a long time and place it in a sealed bag or box to avoid contact with air.
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