Spraying liquid and method for removing colored patches on surface of silver ware

Abstract

The invention discloses a spraying liquid for removing colored patches on the surface of silver ware, which is prepared mainly by using the following components in parts by weight: 78.7-92.4 parts of deionized water, 1-5 parts of reducing sugar, 0.5-1 part of nano titanium dioxide, and 0.1-0.3 part of sodium carboxymethyl cellulose or polyoxyethylene glycol. The spraying liquid takes the nano titanium dioxide as a REDOX catalyst, the nano titanium dioxide absorbs light energy, and forms a large number of strong-reducibility photo-generated electrons in the liquid so as to reduce silver in colored patches of silver sulfide and the like into elemental silver; and the nano titanium dioxide produces a large number of strong-oxidizability photo-generated holes, then the photo-generated holes are reduced by the reducing sugar, and no secondary pollution is produced in the whole process. The reducing sugar in the spraying liquid is oxidized as a sacrificial agent, and meanwhile, the reducing sugar also has certain moisture absorption, and can be used as a moisturizer for promoting the catalytic activity of the nano titanium dioxide. The spraying liquid takes sodium carboxymethyl cellulose as a thickening agent and an adhesive, so that the spraying liquid can be attached to the surface of silver ware better, and then achieve a use effect.

Description

technical field

[0001] The invention relates to a silverware cleaning liquid, in particular to a spraying liquid and a method for removing stains on the silverware surface. Background technique

[0002] Utensils, jewelry, ornaments and other items made of silver have been loved by people since ancient times. Due to the natural characteristics of silver, after long-term contact with air or human sweat, black spots or yellow spots will appear on the surface of silverware, which will affect the surface luster of silverware. People usually mistake it for fading or fading. The main component of this black or yellow stain is silver sulfide, and there are also small amounts of silver chloride and silver oxide. In most cases, it is desired to remove these stains and restore the silver to its pristine whiteness.

[0003] At present, these stains can be removed by physical or chemical methods, as follows:

[0004] The physical method is to apply physical and mechanical force on the...