anchor.diff:    images: {
       "#{current_page.url}paper_test-screen-v1-bristol_board.jpg" => "Bristol Board paper test scan",
       "#{current_page.url}paper_test-screen-v2-mixed_media.jpg" => "Mixed Media paper test scan",
  -    "#{current_page.url}paper_test-screen-v3-hot_press.jpg" => "Fabriano hot-press paper test scan",
  +    "#{current_page.url}paper_test-screen-v3-hot_press.jpg" => "Fabriano hot press paper test scan",
       "#{current_page.url}paper_test-screen-v4-cold_press.jpg" => "Strathmore 300-series cold press paper test scan"
     },
     size: "large",
  
positive.code:   <a href="<%= current_page.url %>paper_test-v2-mixed_media.jpg">Download the full-resolution version (2.6<small>MB</small>) here.</a>
  <% end %>
  
  “Mixed media” paper is, I had supposed, a paper designed exactly for what I needed: wet and dry stuff in the same place. Where I had assumed, before, that Bristol board was for dry media, I'd likewise assumed that it's wet-media-friendly counterpart was this stuff. So I used it for awhile but was disappointed here and there by it. Sometimes it wouldn't handle a wash as well as I'd hoped. Tones might shift as the ink dried; it didn't seem to preserve contrast.
  
  And, unfortunately, it did pretty much everything poorly in my test. The washes have dark “halos” at their edges, lots of unpredictable pooling and blotchiness, and the paper buckles like wet tissue. It also seems to wash out most tones except for the darkest dry strokes, leaving things looking muddy and gray. In general: it's very hard to control brush strokes on this paper because they dry so unpredictably.
  
  
negative.code: 
  <% component "feature_figure", locals: {
    source: "#{current_page.url}paper_test-screen-v3-hot_press.jpg",
    alt: "Fabriano hot press paper test scan",
    border: true
  } do %>
    <a href="<%= current_page.url %>paper_test-v3-hot_press.jpg">Download the full-resolution version (2.7<small>MB</small>) here.</a>
  <% end %>
  
  This is the hot press paper I've been using, so it's sort of the “control" of this experiment. But I also partly wanted to see if it really held up as well as I thought it did against cheaper siblings. I wasn't disappointed; it handled washes and dry-brush alike well, and seemed to also preserve tone and contrast the best.
  
  That said, this paper is versatile but not necessarily spectacular at all extremes. There was still a little haloing at the edges of my lighter washes, and occasionally a little pooling or swirling where it got super wet. But all in all it was the most predictable and controllable surface for the widest range of dry and wet strokes. It took a really wet wash but also allowed smooth, fine lines.
  
  This Fabriano paper is, I believe, their lower-cost/student-grade version, and the artist-grade stuff probably performs even better. It would also be, I expect, more archival.
  
  ## Cold Press watercolor paper
  
  <% component "feature_figure", locals: {
    source: "#{current_page.url}paper_test-screen-v4-cold_press.jpg",
  