http://www.artiscreation.com/red.html#PR264 image above from the extremely useful Dick Blick website to which this pigment database links.
Many thanks to Golden for this article showing the results of tests of various “sizes” (ways of sealing canvas) including RSG. Image from same source.
(Photo above from Tad’s website). Tad Spurgeon is another one of those generous artists and art technique researchers who seeks to share his considerable knowledge
Thanks to Dan Johnson for this useful post. https://danjohnson.co/2015/04/29/5-painting-rules-you-should-break/