The above image, of Albert Einstein, was painted in 1946 for the cover of Time Magazine. Mr Baker created this image by first creating a detailed line drawing, and then using thin washes to add color and form.
This work is part of an online exhibition by the National Portrait Gallery. Here is a link to the site..NPG online show   . The website also has a fun format. The different portraits are grouped together, touching, and one hovers one’s mouse over the image, to open the image and learn more.