Gonzalo Espinosa painted a fresco on with marble dust and high quality fresco lime, aged 2 years, from Sinopia (on 14 September, 2009). That combination made a beautiful intonaco fresco plaster paste, drier and thicker than bread dough, which applied smoothly like butter. However the fresco started cracking severely soon after he started painting. I think the support was too dry. We should have soaked the Hardibacker tile overnight, instead of just for 15 minutes.
Marble dust and fresco lime from Sinopia:
Soaked Hardibacker cement tile for 15 minutes:
Half scoop of marble dust:
Half scoop of Sinopia lime:
It seemed too dry to mix at first:
Thoroughly mixed, the marble dust fresco plaster made a nice paste:
The fresco plaster spread smoothly like butter:
Covered tile:
Troweling polished the intonaco fresco plaster:
Trimmed the edges:
Tile polished and glistening, will dry soon enough to paint on:
Set up with Mayan Blue only:
Maestro Gonzalo begins:
First strokes:
Fills space:
Hair strokes transparent, and blended a bit:
Fresco started cracking while Gonzalo was still painting:
Covered in cracks, days later, after fresco dried:
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Is it normal for the fresco to start cracking before you're done painting?
ReplyDeleteWhat effect would there be with a light mist or humidifier? I'm guessing that it would crack eventually when dry.
What did you do to cover the cracks?
Fascinating!
hdevogt@yahoo.com
A fresco needs 6-8 coats of lime plaster starting with a larger aggegate and ending with a very fine marble dust. it will dry very slowly. Over hardybacker it is drying to quickly and tend to crack.
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