I soaked the Hardibacker tile overnight, for the first time, and did everything I could to keep the fresh tile wet, such as transporting it in the airtight Masterson Palette Seal. The lime/sand mix was probably too wet, but this hadn't been a problem before. I also sprayed the trowel and putty knife with distilled water when I smoothed out the edges and surface. Ironically, all this extra care made the tile too wet to paint on.
Now I figure that I should probably use the drier marble dust and lime combination, on a Hardibacker tile soaked overnight.
Final painting:

One scoop of sand:

One scoop of fresco lime:

Mixed with putty knife:

Mix stiff, but probably too wet:

Soaked Hardibacker cement tile overnight in distilled water (which I had not done before):

Waited until the surface water on the Hardibacker tile dried, so that the tile no longer glistened:

Applied fresco plaster on tile:

Sprayed distilled water on trowel and putty knife to smooth and edge tile:

Placed glistening tile in an airtight plastic box for transport:

Put lid on Masterson Palette Seal:

Laid box in busboy tub, with the rest of the fresco supplies:

Loaded all the fresco supplies in my car for transport:

Drove to The Drawing Studio in downtown Tucson:

Fresco set-up:

Surface of the tile was too wet to paint on when the model showed up. Still glistening:

Baked tile on the dash of my hot car for 30 minutes, under the Tucson sun:

Finally ready to paint:

First sitting:

Fresco started cracking right away:

Covered fresco with box during model breaks, to keep tile moist:

Second sitting:

More cracking:

Fresco place in covered plastic box for transport, and to retard drying (in hopes of keeping it from cracking more):

Update, 4 November 2009 --Cracks more pronounced as fresco dried:

We had Aaron Brothers frame the fresco:


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