How to degauss the chalcedony 1. Sunlight degaussing purification method Place the topaz in the sun for half an hour to an hour to achieve the degaussing effect; use this method to pay attention to: 1. Do not place paper or other flammable materials near the spar, because the chalcedony will be exposed to sunlight. Focusing can cause fire hazard. 2, the time in the sun should be too long, too long will affect its color. 2, Moonlight Star Morning Radiation Degaussing The chalcedony is exposed to moonlight for one night under the moonlight of the 15th lunar night of the lunar calendar, which can achieve the purpose of degaussing and has the best effect. In addition, the days before and after the full moon night can also be demagnetized by this method. 3. Sea salt immersion degaussing method The chalcedony is placed in a saline solution containing a proper amount of sea salt and immersed in a container for 3 to 4 hours to achieve degaussing effect. Cotton Rayon Fabric,Cotton Rayon Blend,Cotton Rayon Blend Fabric,Polyester Cotton Rayon Blend SHAOXING HENGHAI TEXTILE CO.LTD. , https://www.henghaitextile.com