Arknights Calculator · Materials

Purchase Certificate T3 material

Where to farm Purchase Certificate in Arknights, what to craft it from, and which operators need it.

Where to farm (estimated)

Stage	Drop tier	~Sanity/ea
AP-1	Always	≈10.0
AP-2	Always	≈15.0
AP-3	Always	≈20.0
AP-4	Always	≈25.0
AP-5	Always	≈30.0

Operators who need it (0 operators · full build)

Not used directly in upgrade costs (intermediate craft material).

FAQ

Where is the most efficient place to farm Purchase Certificate?

The best Sanity-per-item stage is AP-1, at about 10.0 Sanity each.

To total several operators with a crafting-aware farm plan, use the Arknights Calculator.

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