Invisible Text in Exported PDF

[Jules Fern]

Desperate for help here.

I have a 4 page document (images and text)

All text is visible Black on screen in working file. Have exported document as PDF and some text appears perfectly, some (most)  is almost invisible.

You can see that text is there  but is so faint or ghosted that its unreadable.

I've selected each text box on working file and all text is the same font, size, colour and opacity.

Any advice greatly appreciated

Thanks

[firstdefence]

@Jules Fern What PDF export settings are being used, is it possible to upload the offending publisher file and or the resulting PDF?

[Jules Fern]

Problem resolved. I don't remember doing it but had clicked/applied an outline style 0.2 (to 8 & 10pt) fonts in one text box and 

subsequently copy/pasted that text box and overwritten the text. Must have accidentally clicked the style while shuffling through open windows.

Anyway, all-good now.

Thanks