The acrylic will burn off, and shouldn't cause a single issue, other than a little soot from the kiln as it burns off.
Years ago, as an experiment, I painted a bisque tile with acrylic. I then put a clear glaze over top and fired it. The clear trapped the acrylic in so it couldn't burn out. The image was still recognizable, but had a heavily aged appearance.
Hmmmmm....I should start experimenting more with that....
Yes.....tried this at college, was very curious to see what would happen
using acrylic and oil colours with the same basic types of oxide colours found in ceramics.....yellow ochres, red iron oxides and umbers, chrome greens, cobalt blues, cadmium reds, oranges and yellows, titanium and lead whites but could not find a cobalt based black so used carbon based blacks, half tile glazed, half tile unglazed
at 1000C many colours 'held on' but lost the organic lamp and bone black to smudges, at 1100C lost the cadmiums too and blues and greens faded, at 1220C earth oxides and lead white 'held on' but most everything else faded or disappeared,
good reminder, will try this experiement again I think!!
Mudslinger Ceramics : www.mudslingerceramics.net
'Don't worry about your originality. You couldn't get rid of it even if you wanted to.
It will stick with you and show up for better or for worse in spite of all you or anyone else can do.'
- Robert Henri