It was rare for blacksmiths to reach 100% efficiency in producing items of the same grade as their magic stage!
Most would advance to the next stage before even reaching 95% efficiency. In fact, the normal range was between 80% and 90% efficiency on items of the same grade as a professional progressed through the ranks.
Most would only gain access to the understanding needed to produce items of 100% efficiency or purity when they changed magic stages and were able to see the world differently.
As one advanced through the ranks, one would not only experience an improvement in the richness of one's mana but would also undergo a qualitative evolution that would increase all of one's attributes. Among them, talent and the ability to see the world evolved, and it became easier for people to see old mistakes and how certain things would work better.
