> Hi, > > This regards using png images with portions that are > 100% transparent. What seems to happen is that this > kind of transparency is respected even when exporting > to PDF 1.3 (as seen in acroread and kpdf), which is not > what I was expecting.
You are right PDF1.3 does not support transparency and as far as I know scribus is not able to reduce/rasterize transparency to pdf. > So I'm wondering if this is > too good to be true, that I may be able to use this > kind of transparency without restriction on what PDF > version to use, maybe even PDF/X-3... Sorry, no. X3 is 1.3 based and therefore does not support transparency. > The question is, > can I rely on this behaviour? If it is so - ? - it would be kind of a violation of pdf standard definitions. If a pdf is tagged to be ? 1.3 or ? X3 AND includes transparencies RIPs will reject the pdf or will give you false results. > What I guess was expecting was that since "PDF 1.3 does > not allow transparency" the transparent part of the png > would be made white, or maybe black. "Normally" the whole or partial element(s) will be block out at least when printing seperated. Any reason not to use 1.4? Jon
