I copy the image off the internet to my laptop, insert it into Powerpoint, reduce it to the desired size, and print it on glossy or matte paper in my Deskjet printer, with the quality set to "best" and the paper to "glossy". I believe it helps to select the Internet image with the highest resolution. When you search images on the Internet, the thumbnails usually show the number of pixels in the image (for instance, 400 x 800). The higher those numbers are, the sharper the image will be.
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