Lol,you need HD Ores to go to +10.The Enriched Hammer npc stops upgrading your gear at
+9.You then need to talk to the Mighty Hammer npc to attempt to upgrade your gear to +10 and beyond.Imo though,Safe to 10 certs aren't worth it.If I downgrade to +8,(with my luck anyway),it would take me one or two ores every time to get back to +9.Then I try Mighty Hammer again with attempts to +10.+10 certs aren't worth it for me,because the same zeny I can use to buy those is the same money I can use to buy a box of enriched x50 ores.
i know you need HD ore to +10 but with my bad luck....
i had a +9 headgear and here's what happend next
i used (400 E.Elu) + (5 HD ores) + (3 safe+10cert) and yet, my headgear is still +9 because i cant get it to +10.
for the first 2 attempts to +10 that failed, i used 6 or 8 E.Elu to get back to +9, and after that, it went downhill. It just wouldn't get back to +9. I'm not trying to +10 it ever again.