We finally found a solution to the PNG problem we…

We finally found a solution to the PNG problem we were having when printing from Internet Explorer. A company that I’m doing some work for have a system that produces a PNG file containing bar codes, which is sent via HTTP to Internet Explorer from where the user can then print the image. While this worked fine on NT4, on Win2000 and WinXP, we were getting fuzzy printing, and Microsoft PSS were unhelpful. We finally found that the PNG files were being generated with a bit depth of 32 and that IE presumably thought this meant it might be a photo and it ought to do some processing on it to give a good print result (printing from other apps such as Paint gave perfect results and we tried different print drivers, etc. with IE). By converting the PNG to a simple monochrome image, IE leaves well alone and we get a correct result.