Can you use underglaze transfers on bisk or should they only be used on "raw" clay?

Jess has a class on using the transfers, and several demos on the live at 5 and clayshare con. i think she said they can be used on bisque or greenware.

They can be used on either, but work much better on greenware.

Check these out for how to apply:
https://www.clayshare.com/using-underglaze-transfers-on-thrown-mugs
https://www.clayshare.com/using-underglaze-transfers-on-thrown-forms
https://www.clayshare.com/patchwork-pottery-with-underglaze-transfers