I'm trying to get my head round how these brands work:

For example my armorer has Brand of Ice which is supposed to give me 200% efficiency to progress if I use it on a recipe that has ice affinity, or 100% otherwise..

So, I try it on the recipe for Mythril Ingot which (for amorer) uses ice shards..

But it only gives me 50 progress as compared with Standard Sythesis (150% efficiency) which gives me 71 progress and for the same CP cost!

So is the affinity of the recipe NOT dependent upon the crystals it uses?