Pearl is just a reflective substnce so,
The more space you give it to reflect,the more it is reflective.
Pearl IN base is dependant on the BASE and LIGHT reflecting off it.
Light bases do more,dark is more dependant on light.
Edges will get the most .
I've done Green pearl on Black base which shows nothing inside but,you apply sun and it comes to life.
Gold on white is about the same.
It's really dependant on the LIGHT source to do IT'S job.As well as the "space" provided above the base to do it's reflective thang.
Too much,and you end up with a flat or overly speckle job. A little,and you get the edges.
Try some test panels to get what your after is the BEST way.
1tsp,1tblsp,1 too much.... It's a guessing game as to what YOU want and the ONLY way to find out is to experiment with the powder or paste. :mwink: