The Making of the Glencairn Methuselah Window: Page 73
continued from page 275 <sic>
Modelling Clay Backing ground up in turpentine at any rate it was mixed eventually with turpentine and oxidized turpentine stirred 13000 times
It dried rather quickly.
I put the above on irregularly nothing else was done to the back
Caution! – but you must not go over paint after you put it on – unless you strengthen it immediately. Don’t grind with iron knife! If you can help it.
HALFTONE FILM <note in box - “now put on
by hand some stuff as ame around edges 3 Olive texture, 1 Golden
Texture, dots here and there”>
FIRE PAINT ON BEFORE PUTTING FILMS ON
Grind up Modelling Clay Backing in one grinder in turpentine now
add a little fatty turpentine and dilute in with13000 times stirred
oxidized turpentine. Spatter with cut-off end of small toothbrush
leaving bare spaces – after this sets go over bare spaces
here and there with a flat brush to add more tone – soften
edges 3 Olive texture, 1 Golden Texture.