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Topic: cornstarch, water, oil and glue?  (Read 3149 times)
Tags for this thread: bread_clay , salt_dough , cold_porcelain , cornstarch_clay  Add new tag
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Little owl
« on: March 31, 2011 12:11:01 AM »

Hey there!
I hope I am asking this question in the right section of the forum, if not please let me know Smiley.
Its about making clay.
I once learned how to make clay from an artist in Lima, she uses this clay to make jewelry and such, but she told me the ingredients in Spanish which was hard for me to understand at the time.
She did show me the ingredients as well, and I saw cornstarch, childrens glue (the white kind) some oil, some water and acrylic paints for color.
But I do not know the quantities of all these ingredients. I already managed to get a clay like substance at home, but when it dries its not as strong as her variation. Her dried up clay was really sturdy. 

The nice thing about this clay was that you can make really small and intricate things, its easy to make pretty flower leaves that are very thin and even a bit transparent. Its more subtle as a clay then polymer is (the polymer I know). And its very handy that no oven is needed, it just dries up.
I want to teach this to some kids, since only save ingredients where used, but of course need to know how to make the perfect mix, does anyone know this kind of clay?
Its also possible to use glue that is made for wood, she also showed that, but I like the children's glue because its save for kids.

I`d love to know how to make it again!
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Diane B.
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GlassAttic --polymer clay "encyclopedia"


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« Reply #1 on: March 31, 2011 09:04:57 AM »

What you're describing is almost certainly a cornstarch-based clay sometimes called "cold porcelain." 
It's an air-dry clay that uses corn flour (cornstarch) instead of wheat flour (like bread clay or salt dough clay do), and is somewhat translucent and flexible after drying.

It can be made at home, but it's hard to get the formula and technique exactly right, but might be okay for kids or things that don't need to last, etc.  (It can also be purchased in craft and art supply stores pre-made, or partly pre-made.)

As for the glue to use, you want a permanent PVA glue (--polyvinyl aetate, also called permanent "white glue").  The cheapest kind of that glue in the U.S. is called Elmers GlueAll, and "wood glue" is the same basic kind of glue but it's yellow.  Most of the other glues used "for general crafts" are permanent white glues too.
http://en.wikipedia.org/wiki/Polyvinyl_acetate

If you want some recipes and tips on making "cold porcelain" clay, as well as some of it's disadvantages, etc, check out this page at my site:
http://glassattic.com/polymer/sculpture.htm (go to the subcategory called Paper Clays and Cold Porcelain under the category "Non-Polymer Clays")
http://glassattic.com/polymer/armatures-temp.htm (> Cornstarch Clays --the formulas/etc just happen to be on this page since they can also be used as dissolvable/softenable shapes inside polymer clay)

Most people use "salt dough" clay for situations like this since it's cheap, will get good detail, is decent quality compared to some other air-dry clays, can be painted or colored in the body of the clay, will dry in 24 hrs, etc.
http://www.google.com/images?q=salt+dough+clay
http://www.google.com/search?q=salt+dough+clay
The homemade clay called "bread clay" will get even finer detail but is harder to make up in bulk.
http://www.google.com/images?q=bread+clay
http://www.google.com/search?q=bread+clay
There are also paper-based clays that could be fun, some of them homemade like "papier mache paste" or clay.
http://www.google.com/images?q=papier+mache+paste+pulp+clay
http://www.google.com/search?q=papier+mache+paste+pulp+clay
You might also be interested in this page for all kinds of clays, etc:
http://www.kidactivities.net/post/Play-Dough-Recipes.aspx

(As for polymer clays, they are usually more versatile than any of the air-dry clays --and will also be flexible if thin, and translucent if the right "colors" are used--but they aren't free or as low cost as some of the homemade air-dry clays.  Some lines of polymer clay though also aren't suitable for *thin* uses since they'll be brittle if stressed after hardening: original Sculpey, SuperSculpey, and Sculpey III).

HTH,
Diane B.


« Last Edit: March 31, 2011 09:33:07 AM by Diane B. » THIS ROCKS   Logged

POLYMER CLAY "ENCYCLOPEDIA" 
http://glassattic.com/polymer/contents.htm
few of my photos
http://s96.photobucket.com/albums/l163/DianeBB
(had to move them from YahooPhotos, so many now without captions)
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