In a dgn file, the lightly filled (with color gray) shapes in my drawings will be printed solid black to PDF or on paper. I've turned on Rasterized and Transparency on Print Setting, but nothing will change. It is sent to print in Monochrome using the pdf driver.
Steps to Resolve
The filled gray shape is identified as color 56 with RGB 210,210,210 - Information from element properties.
The steps are:
Result of monochrome pdf print