Alternative To Jasco Tile Sealer For Sealing Raku

[Fried Cats]

Any of you Raku potters using the copper matt glazes know that Jasco is the best to seal and retain the colors over a longer period of time. I have used it for years and it works.

 

Now comes "green" and Jasco has changed their formula to a water based acrylic formula that kills the raku colors. I have contacted the manufacturer and cannot get my hands on the "Old Jasco".

 

If you have encountered this problem and found an alternative that works, please share. I am desperate. Or, I am willing to buy your surplus.

 

And those of you who are unaware of the change, heads up! Join me in a search for an alternative

[earthartam]

I don't raku as a rule, but often do smoke or pit-firings. I seal my pit-fired pots with wax, plain old wax like you make candles with. Heat the pot in your home oven while melting wax in double boiler on top the stove. Either dip a small pot, or use an old brush to "paint" it on inside and out. The warmed pot will let the wax soak in, water-proofing and giving the clay a beautiful warm glow. Holds water, too

[macdoodle]

just saw this-

 

on wed 13 feb 08

 

Personally,

I don't feel raku should be sealed either. But if one uses a high

content of copper in a finish..beyond 5% according to Tom Buck, the

color will oxidize.

So, for that purpose, maybe someone would want to arrest a color by

putting a sealer on it.

I would never apply a sealer to a surface where they would be ingested

-> food or drink.

I have put light acrylic medium with UV protection on top of some of

my slab pieces and tested them outside in the long summer sun of

Montana for over 8 years. They did not fade where coated.

 

Marcia Selsor

Brownsville, TX

http://marciaselsor.com

[Marcia Selsor]

thanks Macdoodle,

I was just going to post that information.

also, my friend , Tom Buck, recommended not to use more than 5% copper in the glazes because they do become susceptible to oxidizing more easily.

Marcia