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How Do You Color Slip?


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What type of colors? You can make casting slip from earthenware. If you're talking pinks, or greens, blues then stains may be better and yes it is expensive..

Depending on the intensity of color, the higher percentage of stain is needed. And most likely you could overload it and cause diminished firing ability or have problems with dunting. It all depends. Chris Campbell uses stains in her porcelain and knows what per centage of stains will give you what colors using a porcelain body. Get a mason Stain reference chart to see the reference codes of each stain so you know which ones to avoid with particular chemicals in the glaze or clay body. You don't just throw it in. You need to know the water content to get accurate percentages. Better to mix a recipe from scratch to get it mixed in evenly. You could probably use a commercial slip, again expensive, and it may mix in if you work at it.

 

Marcia

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Hi Marcia,

thanks for your feedback,

 

I am looking at beige, light grey and a slate / charcoal color.

 

I am using a white commercial stoneware slip,

How would one test the water content? Would the supplier of the clay know this or can I actually test it?

 

I will look at Mason stains.

 

Thank you.

Candice.

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I make my own colored slips from the clay I use in general. I don't have any problems with making colors in the beige-brown range just by knowing what the clay looks like when it's fully fired and guessing it's final colors, and a few tests of course. I save scraps of the clay and let them dry then mix them in little jars of water.

I'm not sure about the gray-charcoal though.

 

Thanks for the question I've been wondering about the blue and pastels myself.

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  • 2 months later...

hi -

has anyone had experience with colouring red earthenware with mason stains.

i want to decorate greenware with colored slips and fire to ^04.

any ideas on approximate ratios - as i would  have to order stains from overseas

regards Karl

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