Fire Ink

This rich yellow ink reacts with a creature’s body heat to create a flickering, flame-like glow.

Source Advanced Race Guide

It takes 10 minutes to apply fire ink, and 1 dose covers an approximately hand-sized area. Once applied, the ink glows as a candle for 24 hours. Four or more doses applied to the same part of the body glow as a torch for 24 hours.

The alchemical reaction of the ink to the target’s skin and body heat is painful and irritating, giving the target the sickened condition while the glow lasts. A DC 15 Heal check can temporarily soothe these sensations, negating the sickened condition for 1 hour. Creatures immune or resistant to fire are immune to this sickening effect. Ifrits are especially known for their fondness for fire ink, and ifrit fire-dancers often decorate their skin with flaming designs before performing. A concentrated version of the ink costs 10 times as much and can be used to make permanently glowing tattoos.