Can anyone help? The Image changes when illustrator file saved as a pdf.

[yvonnek22]

When I save my illustrator file as a pdf, it is making the pattern brush layers appear darker. Can anyone advise on why this might be happening? I have to do a presentation and it looks awful! Is there a way to prevent this from happening?

2 reference screenshots attached.

Many thanks,

Yvonne

[Ton Frederiks]

Is your document RGB or CMYK?

Are there transparency blending modes applied?

What are your PDF settings when saving?

Can you share an Illustrator file with the problem brush example? 

[Monika Gause]

This could be a setting in Acrobat that enhances thin lines.

But it points to a possible issue with your lines in the brushes in that they may be too thin for reproduction.