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perkolator

Member Since 08 Feb 2012
Offline Last Active Jan 20 2015 06:19 PM
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Posts I've Made

In Topic: How Long Will Modern Pottery Last?

13 January 2015 - 04:36 PM

since we essentially duplicate the process of forming rocks, all of our ceramics is permanent and will be here until it melts again with some great force of energy.  maybe some sort of ultra hot explosion from warfare, volcano or lava flow, or perhaps heat from asteroid colliding with Earth.  with that said, there is a lot of terrible ceramics out there that will be here forever.


In Topic: Deflocculated Wax Resist?

13 January 2015 - 04:17 PM

i've never colored my wax, but sometimes add color to my glazes and slips since i'm colorblind and can't easily see some layers.  my recommendation in this case is to try powdered food coloring or powdered water color pigments (or even acrylic) - they work quite well, store forever, and will likely not have this issue.


In Topic: Using Wire Support To Make Spikes

17 December 2014 - 02:14 PM

yes, you can repeatedly apply/build up a layer of slip on a piece of wire (or even a nail) embedded in your clay.  the artists I know of who do this use something like a syringe or squeeze bottle to apply.  since the wire inside is rigid, and the clay needs to shrink around it, it's hit or miss in regards to the cracking you'll get.


In Topic: Help! Need An Oven Glaze That Is Food-Safe

15 December 2014 - 02:09 PM

I'm pretty sure to do the sharpie mugs, you simply draw on a glazed item and then bake it on - no messing with the underlying glaze at all, so not sure where you got the idea of the etching.  My wife did this with her class once and they all came out successful for what it is.  It's not "permanent" like true glaze is, it does come off with a good amount of abrasion, like even my fingernail if I wanted it off.  Other products to do similar things would be a Pebeo Porcelaine china paint pen, which is made to bake on at home oven temps - it is also not permanent, but I believe it's more resilient than Sharpie.


In Topic: How To Slab A Round Cylinder

15 December 2014 - 01:59 PM

any smooth-sided cylindrical form on the inside (cardboard tube from paper, sonotube for casting cement, PVC, ABS, anything...)

roll out slab with machine or make by hand, put layer of newspaper between clay and form to prevent sticking and to aide in slipping it out.  cut a straight edge on slab, then roll it over form (like how you pickup up dough with rolling pin) to make slight impression where the seam will be - then cut both ends at a 45* angle so you get a nice flat seam with most surface area for good contact.

the tip Marcia gave regarding cradling the slab with tar paper is a good one - great for when you cannot roll the tube over the slab and need to apply it to a vertical form.