The Spanish, Italian and Portuguese Old Masters all painted on hand-woven patterned linen canvases. This 'first layer' has been given only sporadic study by art historians. I started deciphering the weaving draft of El Greco’s 'The Burial of the Count of Orgaz', in 2016. It recently culminated in authentic, hand-woven reconstructions of historic canvases.
working spot !
...not always a digital working spot! Analyzing an infrared reflectogram, on line high resolution images from Technical Bulletin 36 of the National Gallery London. Great to have access to this valuable information for Lab O, will now make a draft for this....stay tuned