Refining efficiency calculation

I’m not sure if it’s a bug or just unlucky/incorrect description, but:
In the description of every refine skill there is the following line:

Skill to refine this resource. +10% bonus to refining per level.

As maximum skill level is 8:

  • at skill level 8 the maximum efficiency is achieved: 100%
  • at skill level 7: 90%
  • at skill level 6: 80%
  • at skill level 5: 70%
    etc.
  • at skill level 1: 30%
    In other words, 0.2 + 0.1*skill

However, currently it seems to be wrong, starting with 20% and probably getting up to 90% at level 8:
I get 20% with skill level 1 and 60% with level 5.
-> 0.1 + 0.1*skill

I talked with Prev about this and he told me to read the main page of the refinery :wink:

You mean this?

It is near impossible to get 100% output

Hm, alright makes sense. As refined components add to 100% of ore batch, it’s logical that some small fraction is always lost in the refine process and only 90% are achievable. Ok, I withdraw my question :smile: