My first home made casein emulsion - Page 2

dbclemons · #16 05-01-2011, 12:01 PM

There are some water soluble soy resin paints out there. I've seen a craft paint in hobby stores and at least one brand of house paint made with soy resin. Not certain how they're produced, however. Some sort of acid treatment, I suspect. The oil is also used in paints, and you can often see "soya oil" as the vehicle in some artists paints. It's also a major component of alkyds. I've tried experiments with soy protein powder, but not had satisfactory results.

MichaelFraley · #17 05-01-2011, 10:31 PM

Thanks for the response, David. I started with commercially available soy milk, curdled it with vinegar, dissolved the curds with borax, etc. It's not as satisfying as a dairy milk casein, but it's better than I expected.

Most of the soy paints I've seen offered (including those by Glidden, I'm pretty sure) use the soy with an acrylic emulsion. I've read about some of the work being done with soy oil based paints, and that's very interesting. As I mentioned before, making dyes with soy milk and pigment is a Japanese tradition, but it makes a fairly satisfying kind of watercolour too. I've scoured the web and can't find anything at all regarding a soy casein of the kind that I was attempting. Of course, the syrup / glue that you have at the end of the process isn't nearly as strong (as far as stickiness goes) as the kind produced with dairy milk. Perhaps that's the whole issue.

Tonight I did go ahead and make another batch of milk based casein, and it turned out just the way I wanted. I'm very giddy about it. Making this stuff reminds me of the days when I was learning to boil rice. It's not brain surgery, and it's very good when it turns out all right, but it takes a little trial and error.

Thanks again.

= M

dbclemons · #18 05-02-2011, 10:03 AM

The brand of house paint I was thinking of is called DuraSoy. I don't believe there's any acrylic in it since that company also makes an Acri-Soy product. The craft paint was from Delta Creative. I'm not recommending these, mind you. Just pointing them out.

MichaelFraley · #19 05-02-2011, 12:47 PM

Thanks. I wasn't aware of those brands. I knew that Glidden had experimented with a soy casein in the 1930's as a way of cutting the price of making casein paint, but I had never heard whether there were any successful experiments of that kind or not.

Here is a link to a Flickr set that contains samples of everything I've been rambling about for the past week or so.

http://www.flickr.com/photos/michael...th/5680709368/

mad4color · #20 05-16-2012, 03:07 AM

I collected a full variety of the DuraSoy paints after getting one bottle in a JoAnn Fabrics on clearance for fifty cents. Managed to use various coupons and clearance sales in Hobby Lobby and Joann Fabrics.

They have no smell to my nose, and I am one of those strong allergic reactors who can't use turps!

Of course, Delta does not list their pigments, but I feel confident that they are fairly lightfast. I recognize a lot of the colors.

They are pleasant to use, very strong, but dilute nicely. Dry quickly! Delta says not to mix them with other paints at all, that they are paper sealer, paint, and varnish all in one.

I'd really like to know more about them! Will post a photo later.

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