On second test the decal was made in two steps. First a cutout of Joan's image was used to squeegee through the screen the silhouette of her image on to the UWET decal paper. Then the photo was printed on to the Beldecal decal paper and aligned on top of the white enamel silhouette.
Finally this composite decal was applied to the tile and fired to cone 015.
Note that the colour of the toner decal image is still sepia! Two things are happening.
First the green and blue enamels are not now melting enough and the toner is only "tacked on top". I am not sure why but perhaps the enamels are now part of the white tile glaze. I am not sure what cone I fired it to on the first test but I suspect cone 05. I hope I can find notes on that to confirm.
Second the white enamel is melting and adhering to the green and blue enamel while the toner is adhering to the white in a permanent fashion which resists the wiping off done on the lower half of the image.