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Bob Coyle

Member Since 06 Jun 2013
Offline Last Active Yesterday, 09:04 PM

Posts I've Made

In Topic: Silicone Caulking Cure Time?

01 December 2016 - 06:01 PM

It mostly loses solvent  in 24 hrs, but depending on the type, and how much air circulation it gets. it could take days to really cure out enough to not allow a bearing to slide off center.

In Topic: Help Diagnosing Glaze Or Kiln Problem?

20 November 2016 - 02:48 PM

My guess is that there is a reaction taking place between the two glazes. Looks like the bottom may be a copper based glaze and the reaction may be metallic copper being formed because of some reduction condition taking place... of copper oxide being formed because the top glaze is more basic than the bottom.


This is just a guess. Could be caused by just a contaminant in the glaze.  If you are firing electric, then your atmosphere is probably oxidizing.


Run a test tile with both of the glazes mixed together and see if the whole thing turns black.


PS... I hope those bowels are not being used for food.

In Topic: I Ate Some Clay.

09 November 2016 - 02:41 PM

Speaking of mud from Death Valley...


The is an outcrop of the K/T boundary on a ridge in Raton New Mexico.... think giant asteroid... dead dinos...  that has mudstone on either side of the boundary layer. I made glazes  using the clay from each layer and glazed mugs so that all three geological eras were there in order. on he outside. Geologists and paleontologists loved them.

In Topic: I Ate Some Clay.

05 November 2016 - 10:23 AM

If you add enough clay to it then it will work... You have to have the basic plate structure for it to hold together and fire to a durable solid.

You might try adding the silt into a clay body to get interesting textures. I have made slips this way. Give it a try.


Eating clay is not so unusual. It has been used to absorb accidental poisons   and to stop diarrhea.

In Topic: I Ate Some Clay.

04 November 2016 - 02:18 PM

it wouldn't.... I tied throwing very fine silt and since it did not have the plate like structure of clay, it would not throw no matter how fine.