It would be good if someone wrote a book on "sacrificial binders". I think that is the subject area.
EDIT: Actually, when I think about it, I should be talking with enamelers, working in glass. Because my enquiry is probably better addressed by those with practical experience of mixing pastes with glass frit.
Binders I've seen mentioned are:
* Water
* gum Arabic
* gum tragacanth
* dextrin
* vee gum
* CMC
* Knox gelatin