Laptops, CRT, certain LCD desktop monitors and smartphones are capable of high PPI. This page tests this by displaying images at a smaller than their native size. That means if you open this page on a high PPI device next to a normal 96 PPI one, there will be a difference of sharpness and detail. You can try it out on “normal” monitors by using the page zoom in your browser. Zoom in to 200% and you should clearly see the diffierence in the images. The logo of my site is also higher resolution than displayed.
Fireworks at high DPI
Fireworks at standard DPI
Temperature graph at high PPI
Same temperature graph at standard 96 PPI
Fabric high PPI
Fabric at standard PPI
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