From Pathfinder Treasure Vault (Remastered), which isn't enabled.

Alchemical Chart (Greater)

ITEM 18

Price 19000 gp

Usage held in 1 hand

Bulk L

This sturdy, rigid alchemical chart contains shorthand references on quickly mixing reagents for maximum effect. If you hold this chart while using Quick Alchemy, the items you create of 18th level or lower remain potent for 1 additional round.

Pathfinder Treasure Vault (Remastered)ORC