Why does it always being 0 on cool supertack plate when its using sunlu pla+ silk.
Is that a warning or you can just easily turn it up?
What is zero? You have to write that down…
But beware: PLA Silk is not actually suitable for this plate, as it adheres too well and, if you’re unlucky, you won’t be able to get it off. That’s why there’s a warning on the website:
Bambu PLA Silk material exhibits strong adhesion on the SuperTack build plate, which may damage printed models. Therefore, we do not recommend using Bambu PLA Silk material on the SuperTack build plate.
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Came to say the same thing. It’s a PITA to remove from Supertack. It’s marginally better on the Biqu Frostbite, but it will stain it. I’d use either the gold or the smooth plate depending on your preference for texture.
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Yesterday, I printed PLA Silk again, and even on the golden textured plate, it adhesive too strongly. That’s why I only use the gold textured plate for Silk. Because I once tore a smooth plate, to be precise, the surface - and even with the freezer, it wouldn’t come off. 
I get that sometimes on the Sprayed Ultem. My BL golden plates don’t give me that many problems when I use them. That Ultem is the next best thing to supertack, but I don’t know if it’s worth the expense.
Supertack is always 0 because Silk Pla is still PLA. In addition there’s a reason it gives a warning to not use Silk on it. As you’ve noticed Silk has a tendency to bond well with the build plate.
If you are having problems with it sticking on the plate too well, use a thin layer of glue stick (came with your printer, or Elmers and the like) to help release the print off the Gold Texture plate. This may or may not change the surface on the plate so try a test print first. I’ve never noticed anything but my experiences are my own, ymmv
Glue Stick can be used as a release agent, but do not put it on the Supertack. It will do nothing but cause you headaches. Use it on the Texture plate, Smooth/High Temp, Engineering or plates such as those.
I use it all the time. The trick is to use non-silk PLA on the first layer.