In WebTools Express you can select a setting to flatten transparency information in a PDF document before printing. The setting is used for PDF documents containing transparency information only.
You can choose between the following values:
[Quality]
Select this value if print quality is an important factor. The processing speed slows down and more memory is required.
[Speed]
Select this value if PDF processing performance is more important than print quality. Large and complex PDF files are processed faster and use less memory.