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PeterH

Member Since 28 Apr 2013
Offline Last Active Today, 12:12 PM
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Posts I've Made

In Topic: Ventilation System Needed?

Yesterday, 07:46 AM

unless you're firing something really toxic like lusters.

 

Neil, an off-topic question that has interested me for some time. Any idea what causes the toxicity during luster firings?

Two obvious candidates are:
- Fumes from the combustion of the resinates themselves.

- Fumes from the various "industrial" solvents used.

I've been shown round a few soldering lines, both manual and automatic, and can attest to the undesirable nature of rosin/

resinate fumes. It was also noticeable that last-years (or the last decades) preferred "industrial" solvent was often phased-out

due to newly discovered/admitted H&S issues.

A third possibility is of course:
- Fumes from historic solvents such as real turpentine, spike oil, etc.
 


In Topic: Is It Possible To Make A Hydrophobic Glaze?

18 June 2016 - 05:34 PM

Found it: John Sankey used a corn-oil based glaze for test tiles.

http://web.ncf.ca/bf250/glazeiron.html

start looking at Iron Glaze Chemistry

 

... and somebody getting a surprisingly good coverage of a 3D object

... although it is onto a pot, I assume that it is using non-firing [acrylic?] paints

 


In Topic: Is It Possible To Make A Hydrophobic Glaze?

18 June 2016 - 06:22 AM

I have a vague memory of somebody doing test-tiles with an oil-based glaze.

[IIRC he was experimenting with iron glazes and wanted to include water-soluble

ingredients into the batch.]


In Topic: Dish Detergent In Glaze Makes Bubbles, How, Please

16 June 2016 - 12:59 PM

A related thing I used to do was wax out areas on a darker clay, then spray with a shino glaze. The glaze beads up on the waxed area.  I had intended to wipe those off but decided to leave them on. The result was an unglazed area with little bumps all over it contrasted with areas of shino .    Always meaning to try it with something other than shino. 

 

At one time I used to get a similar effect with a sprayed tin-glaze on latex emulsion. So it does work in other circumstances.


In Topic: Dish Detergent In Glaze Makes Bubbles, How, Please

16 June 2016 - 11:16 AM

Peter, I couldn't open your link.

 

Yes, the linked picture seems to have died.

 

Three examples here:

http://www.coombefar...ku-tim-andrews/

 

Right hand pot in 1st picture.

Left hand top & bottom pots in 2nd picture.