I am using Auto Cad LT 2012 - I always convert my plots to PDF in Adobe Acrobat Pro 9 and send to customer via E-mail - this has worked great for many years. I always plot in monochrome so all plots are full black. All of a sudden the last week of PDF's some of the text and dimension text is faded and too light to see when plotted on paper or when viewed on the monitor. When I preview the output plot before converting the drawing, the text is all solid and perfect, its after I hit print and then see the plotted view in Adobe that the faded text shows up. Not sure if this is an Adobe or Auto Cad issue, Its never happened before. I have not changed software or any settings that I am aware of.
If I explode the text or explode the dimension text it will plot dark, but I do not want to have to go through and explode all text just to trick the plot, I would like to figure this out so it will go back to the old way of plotting,