Editing Hypericum perforatum (section)

===Dyeing pigment===
[[File:Hypericum perforatum - dyed fabrics.jpg|thumb|Samples of wool [[Dyeing|dyed]] using ''hypericum perforatum''—(''from the left''): [[mordant]]ed in [[alum]] and simmered for 15 minutes; unmordanted and simmered for an hour; then left in a dye bath overnight; then simmered for 30 minutes; then simmered again for 30 minutes.]]
The plant generally produces a variety of yellows suitable for [[dyeing]]. When the pigments are extracted using [[ethanol]], a violet-red colour is made which can be used to dye silk and wool when rinsed  in [[vinegar]]. The colours produced are season-dependent.<ref name="HarPin">{{cite book |last1=Hardman |first1=Judy |last2=Pinhey |first2=Sally |title=Natural Dyes |date=2018 |publisher=Crowood Press |location=Marlborough, UK |isbn=978-1-84797-100-5 |edition=|orig-year=2000 |ref=|page=50}}</ref>

The flowers produce a series of four different shades on wool, if used in the correct sequence. Wool [[mordant]]ed with [[alum]] and unmordanted wool is used. The flowers are simmered to produce a deep red liquid [[dye]]. The alum-mordanted wool skein is added and simmered until green is made. If unmordanted wool is added to the same dye, it will turn reddish-[[maroon]]. The final colour produced is by continuing the method, to produce yellow or gold.<ref name="Dea">{{cite book |last1=Dean |first1=Jenny |title=Wild Colour: How to Grow, Prepare and Use Natural Plant Dyes |date=2010 |publisher=Mitchell Beazley |isbn=978-18453-3-569-4 |edition=|orig-year=1999 |page=97}}</ref>