The canvas holder is adjusted using a crank mechanism

might recognize this as a close approximation to that storied color

Pigment Classification: MixtureColor Index Name: PW6 / PY184Color Index Number: 77891

5 Y Value 2

although varnish and top coats will eliminate the fluorescent "glow" under black light

golden heavy body medium violet Molotow Original Black Book The canvas holder is adjustedThis mixture of violet and red pigment with a touch of Burnt Umber and Titanium white creates a fairly neutral, opaque violet. (Series6) Pigment Classification: MixtureColor Index Name: PW6 PR122 PV23 PBr7Color Index Number: 73915 77891 51319 77491Chemical Description: Titanium Dioxide Rutile Quinacridone Carbazole Dioxazine Calcined Natural Iron Oxide containing ManganeseOpacity Transparency: OpaqueLightfastness Rating: 2Permanency: Very GoodMunsell