Ragnarok: The New World Guides
How Refining Works in Ragnarok: The New World
Refining in Ragnarok: The New World is confirmed safe up to +15 — unlike classic Ragnarok Online, a failed refine attempt does not destroy or downgrade your gear.
That removes the single biggest reason veteran players avoided upgrading good equipment in the original games, so there's little reason to sit on refining materials once you have them.
Combined with offline auto-hunting for passive material farming, the refining loop is designed to keep gearing up low-friction even for players who can't commit to long play sessions.
See the full data: Ragnarok: The New World Crafting