Ghost InkConsumable 1
Source Pathfinder Advanced Player's Guide
Price 3 gp
Weight light
Activate 10 minutes (Interact)
This pale-blue ink dries rapidly, becoming fully transparent 1 minute after application. The ink glows red when exposed to heat, such as that from a torch or other open flame. This glow lasts only as long as the ink is exposed to heat, after which the ink becomes invisible again. The crafter of the ghost ink can alter the formula slightly to instead make the ink sensitive to sunlight, starlight, magical light, or heatless light created by an alchemical effect such as a sunrod.
While the text isn't glowing, a creature closely examining a surface marked with ghost ink can detect the presence of the ink with a successful DC 25 perception check. On a critical success, they can make out the ink well enough to use Society to Decipher Writing. One vial of ghost ink is sufficient to write a page worth of text.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
AlchemicalAlchemical items are powered by reactions of alchemical reagents. Alchemical items aren't magical and don't radiate a magical aura.
ConsumableAn item with this trait can be used only once. Unless stated otherwise, it's destroyed after activation. Consumable items include alchemical items and magical consumables such as scrolls and talismans. When a character creates consumable items, they can make them in batches of four.