Why Gold glittering is not stable?

Gold glittering  is a common and very nice effect. But many factories are facing a problem that this effect is not stable. Some times you will find that the glittering is not blinking. What cause this problem?

Element Na is the main material which gives the effect. In the past, technician is using Sodium Oxalate (Na2C2O4) to get the effect. This material is very easy to get humid, humid is disturb the stability significantly. After study, people found that Cryolite(Na3AlF6) can replace Oxalate. But still, this material is not ideally avoid the humid problem. As we all know, Liuyang has at least 4 months with high humididy (over 75%) from time to time, so Gold glittering is still an effect which requires “ special care”.

Now some technicians is testing new material, aiming to totally solve the problem. We hope the good result will come out in a short while.