correct, I don't actually know what the official medium is for 'diamond dust' and because there was no information out there on the materials I just used what I thought would work and give a similar effect. Didnt think to mix it with the ink, but I'd assume that trying to push crushed glass through a screen, even if it was a low mesh count, would ruin it.
In my limited experiments I have found that it is best to buy the diamond dust as the colour required. So put black diamond dust on a black background etc. Clear dust on a black background looks a bit rubbish.
I don't print, but I should imagine the best way is to screen print the PVA glue and then sprinkle the dust on top. Then shake off the excess.
I was in the studio with Mark Petty the other week and did some bad filming of him putting down his glitter/sparkle/dust whatever you call it. He screen prints a gel then pours the glitter over and left it for about 40 mins to dry then shook of as per Aza said. I think he vacuumed them afterwards too. Can't remember what the gel is called. Might be this. www.atlantisart.co.uk/golden-gel-topcoat-w-uvls-semi-gloss/ The glitter was from somewhere else.