I'm attempting to scan some documents with basic science and math diagrams in black and white that can be emailed. The challenge is that some of the pages contain diagrams with gray shading. Many of the reduction tools I've used either remove the shading or change its tone. I have to keep to be able to distinguish among 3 shades of gray, for example, in a bar graph.
The 40 page document at 600DPI in PDF format comes in around 18mb. This approach keeps the image quality that I need, but I'd like to reduce the file size to 5-10mb. I can rescan the document with any settings.
I have an Epson ES400 for scanning. I have all Adobe programs, but I've been using Epson Scan 2 with the scanner.
Would it be better to create a TIFF format? I want to keep the pages as one document.