@prefix dcterms: .
@prefix prov: .
@prefix rdfs: .
@prefix schema: .
@prefix xsd: .
a schema:CreativeWork ;
dcterms:subject ;
rdfs:seeAlso ;
prov:generatedAtTime "2021-04-05T14:44:21+00:00"^^xsd:dateTime ;
schema:abstract "(invisible) Writing in black. Writing in black without ink, that cannot be seen unless you pull it trough water. Take crushed vitriol, put in a clean pot and pour a little fresh, pure water on it to make the vitriol dissolve. Then take a freshly cut feather and write with the water on clean paper and let dry well so no one can see. If you want to show the writing then take a quarter of a measure of pure spring water and add pulver of oak gall (?) and mix together. Then sieve through a clean cloth into a basin, depending on the size of the paper. Pull the paper through the water and it instantly turns blackm as if written with ink." ;
schema:additionalType "recept"@en,
"recept"@nl ;
schema:description "Von schwartzer schrifft., 32075, Illuminierbuch, 35v, Nürnberg, Germanisches Nationalmuseum" ;
schema:identifier ;
schema:inLanguage ;
schema:keywords ;
schema:locationCreated ;
schema:subjectOf ;
schema:text .