Reinforcement

I wonder if there is any way to make items +7 +8 without breaking.

Thanks in advance.

Att I

To reinforce an Item without break it, you must use the Hira/Kaize (known as Rubicine/Pelirute aswell) Concentrate Extract.
It won't break but it still fails

Lower class items like F and E stuff can fail and not break. but good gear like, B and C's will most likely break if it fails.