plant materials ?

[rleeq]

I've seen a few videos where various organic materials were used in the firing of pots. Banana skins as an example. I'm wondering if there are any such organics which are used as main colorant components for glazes.

[Chris Campbell]

These items are usually used in pit firings for the chemicals they release during firing ... for example the bananas have sulfur and dog food has magnesium ... you would have to check what chemicals are in the organics, then check glaze recipes for the same ones.

[Lucille Oka]

Tobacco is a plant used in ceramics but in decoration. The glaze is called a 'dendritic glaze'. Here is the link from A Ceramic Arts Daily with a video that is very informative from Robin Hopper.

 

http://ceramicartsda...ocha-diffusion/

[TJR]

Lots of wood firing potters use plant material to wrap their pots without a glaze. You can dust pots with wood ashes-USE A DUST MASK.

Grasses have silica in them and make a shiny spot. An orange will leave a bluey tourquiose mark. Some potters wrap pots with salt-soaked rope, or oily rags. Remember, this is for high- fire pottery, in a gas kiln with a chimney. I wouldn't attempt this in an electric kiln without a vent in your basement!

Good luck and have fun.

TJR.

[Nelly]

Lots of wood firing potters use plant material to wrap their pots without a glaze. You can dust pots with wood ashes-USE A DUST MASK.

Grasses have silica in them and make a shiny spot. An orange will leave a bluey tourquiose mark. Some potters wrap pots with salt-soaked rope, or oily rags. Remember, this is for high- fire pottery, in a gas kiln with a chimney. I wouldn't attempt this in an electric kiln without a vent in your basement!

Good luck and have fun.

TJR.

 

 

I have used dry corn husks on bisque ware to create a shadow. I am not sure why this works but it does something to the clay and creates a darker hue.

 

Nelly

[TJR]

Lots of wood firing potters use plant material to wrap their pots without a glaze. You can dust pots with wood ashes-USE A DUST MASK.

Grasses have silica in them and make a shiny spot. An orange will leave a bluey tourquiose mark. Some potters wrap pots with salt-soaked rope, or oily rags. Remember, this is for high- fire pottery, in a gas kiln with a chimney. I wouldn't attempt this in an electric kiln without a vent in your basement!

Good luck and have fun.

TJR.

 

 

I have used dry corn husks on bisque ware to create a shadow. I am not sure why this works but it does something to the clay and creates a darker hue.

 

Nelly

 

 

Corn husks have lots of silica in them. If you fired to a higher temp., they would make a shiny area that is glaze like.

TJR.

[Nelly]

Lots of wood firing potters use plant material to wrap their pots without a glaze. You can dust pots with wood ashes-USE A DUST MASK.

Grasses have silica in them and make a shiny spot. An orange will leave a bluey tourquiose mark. Some potters wrap pots with salt-soaked rope, or oily rags. Remember, this is for high- fire pottery, in a gas kiln with a chimney. I wouldn't attempt this in an electric kiln without a vent in your basement!

Good luck and have fun.

TJR.

 

 

I have used dry corn husks on bisque ware to create a shadow. I am not sure why this works but it does something to the clay and creates a darker hue.

 

Nelly

 

 

Corn husks have lots of silica in them. If you fired to a higher temp., they would make a shiny area that is glaze like.

TJR.

 

 

Dear TJR,

 

I knew there was something about the husk. Didn't know about the silica. Thus, while the teacher only used them on bisque, could they not also be put on glaze if they contain silica or would you just be creating a goopy mess? Do you know by chance?

 

Thanks for the chemical information.

 

Nelly