Bulletproof (UV resistant, bleach resistant, etc.) = Yes Eternal (Archival, fade-resistant) = Yes Forgery-Resistant (Impervious to lasers, alcohols, solvents, ideal for security documents) = Yes Water-Resistant (waterproof) = Yes Fluorescent (Glows under UV light) = Yes Lubricated (Lubricated inks for piston mechanism) = No Freeze-Resistant (Resists freezing at extreme low temperatures) = No Blue Ghost Invisible Ink is great for writing secret notes that are only visible under black light. Works best with standard non-printer paper. Bright white papers show less contrast. Noodler's Eternal Inks have been formulated with 'bullet-proof' qualities to make them impervious to water, bleach and light. Safe for fountain pens of all types, this ink provides archival quality and is 100% made in the USA. Size: 3 oz