Statements (27)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:writing_system
|
| gptkbp:alsoKnownAs |
security ink
|
| gptkbp:can_be_revealed_by |
heat
UV light infrared light chemical reagents ammonia fumes |
| gptkbp:historicalName |
spies
|
| https://www.w3.org/2000/01/rdf-schema#label |
Invisible ink
|
| gptkbp:material |
gptkb:milk
dish lemon juice dilute sulfuric acid sodium thiosulfate baking soda solution cobalt chloride glycerin and potassium permanganate phenolphthalein starch and iodine |
| gptkbp:used_in |
gptkb:World_War_I
gptkb:World_War_II espionage security printing magic tricks |
| gptkbp:usedFor |
secret writing
|
| gptkbp:bfsParent |
gptkb:nun
|
| gptkbp:bfsLayer |
4
|