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danstepanek
Posts:2
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| 12/28/2007 10:07 AM |
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| I am experimenting with textures and am particularly interested in weathered and old textures. One look I am trying to find is the cracked paint effect where the paint has peeled in more of a chunky way. I have tried the crackle glaze but it still isn’t peeling in the way I would like. Does anyone know any particular combinations to mix paints/pigments that results in large cracks and peels?
Any suggestions would be very appreciated.
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mikec@pols
Posts:791
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| 12/30/2007 9:07 AM |
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Well.,here's what I know.
Paint peels due to lack of adhesion. Either the properties of the paint or the surface will cause peeling. 'Crackling' is usually caused by fast drying, dryness of the air, temp. changes, re-coating too soon or lack of elastisity in the paint...and sometimes chemical reactions caused from two different paints being applied over one another.
So, if you want your paint to crack apply a HEAVY coat over a dried coat and then force dry the 'wet' coat with heat and air (i.e. a blow-dryer). What you want to do is to make the paint shrink quickly while drying. You want to dry the top layer/skin of the paint faster than the bottom layer, so that it pulls and cracks...the glazes are the fastest way to achieve this. If you put down a coat of oil-based paint and then put latex over it and force dry the latex, it will pull up and crack or wrinkle. This is time consuming, but you can really achieve some neat affects with color this way. 'Sandwiching' latex and oils works well also...
If you want the paint to peel in just certain areas then you can put a VERY thin layer of vasiline, oil or wax in those areas, but you have to be careful of amounts and exact placement. After the paint has dried you can remove anything that you put on to help with the process. This only works with oil-based paints and is very hard to control. It is hard to get the paint to 'bridge' over the areas also. I would try using a mold release(ceramic mold release) for latex.
Oil based paints seem to work the best for these types of effects because they are brittle when dry and and don't have the elastisity of the latex paints.
Flat latex paints also work well because of the smaller amounts of acrylic used in them.
Just some ideas...I hope this helps!
Mike |
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"You either grow or regress...nothing stays the same...." (unknown)
"A man may fall several times in life, but he is not a failure until he says that he was pushed..."
www.portraitsoflifestudio.com |
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danstepanek
Posts:2
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| 01/01/2008 8:25 AM |
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mike, you are a star indeed 
thank you very much for your detailed explanation, i shall try and follow your tips as best i can.
once again. thankyou.
messy new year to you
dan
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