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Member Since 28 Apr 2013
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#93954 Cat Walked On Keyboard, Type Too Small To Read, Need Fix

Posted by PeterH on 08 October 2015 - 12:12 PM

Joseph F. wrote

hold ctrl key(bottom left)  and roll your mouse wheel. its probably zoomed.



... reminds me of the time my Unix main window finished up black characters on a black background.

#91435 Weird Liquefied Slip ....

Posted by PeterH on 26 August 2015 - 08:37 AM

What would be the results of adding too much SS?


See the first graph in


#91129 Using Fresh Leaves For Making Molds

Posted by PeterH on 20 August 2015 - 07:23 AM

nancylee: Haven't tried this myself, but the following suggests that one way is to make a

negative impression in plaster, then take a latex positive from that.


Using a big leaf.


Pre-treating leaves to flatten them.




#90796 Pie Dish Dilemna - Rough, Porous Clay

Posted by PeterH on 13 August 2015 - 01:11 PM

Might be worth collecting some of the droppings on a sheet of white paper. It would serve

as evidence, and could help the potter investigate what was happening.

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#90599 Onion

Posted by PeterH on 10 August 2015 - 03:48 PM

A few pix of sculptured onions, in case it give you some ideas.


http://www.stajcar.c...alia Greens.htm


I quite like the chunky shoots of the first, and the horizontal format of the next two.


#86800 Thinning Slip Water Or Deflocculant?

Posted by PeterH on 09 June 2015 - 04:32 AM

This video may be of interest, especially from 3:50

#77279 Can I Swap Neph Sy In This Glaze?

Posted by PeterH on 13 March 2015 - 09:07 AM

I checked packaging and it is just labelled 'Soda Feldspar' as supplied by CTM in exeter

If it's any help to the discussion here is an analysis from CTM's site

http://www.ctmpotter...elspar Spec.pdf

#76564 What Causes Glaze/clay 'tide Mark'?

Posted by PeterH on 02 March 2015 - 06:42 AM

I bought a pot in Cornwall a few decades ago, which appears to have a dolomite glaze over white stoneware body.

Interestingly it seems to have not a tide-mark but significant areas of the browny-orange.

Attached File  _vase_cropped_10cm.jpg   101.28KB   1 downloads


Looked at more closely the areas appear speckled but free from edge-effects.

Attached File  _vase_detail_10cm.jpg   47.94KB   0 downloads


Any ideas what's happening? I go along with the solubles/volatiles theory for the

previously described tide-marks. Perhaps the pot was dipped and finger-wiped,

distributing the solubles uniformly over a significant [unglazed] area?


PS Chris your example seems to show both tide-marks and more solid areas. Would

you like to comment on any differences in treatment?


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#74625 Does Anyone Else...

Posted by PeterH on 01 February 2015 - 09:47 AM

Unfortunately all the hand balms you are talking about are not available here in Switzerland.


FYI these seem to be available via your local ebay.


Working Hands



Bag-balm in a square tin


#74152 Sycamore Pottery Is Selling Red Copper Oxide, Anyone Have Info

Posted by PeterH on 26 January 2015 - 03:18 PM

Red copper oxide is coated with a waxy substance keep it from oxidising in the air. So you will

probably need to add a drop of detergent before it will wet. 

#72164 Trying To Find A Square Plate Mould

Posted by PeterH on 20 December 2014 - 07:43 AM

... and there are always drop moulds


#71688 Adding Subtle Interest To Surface In Electric Kiln To Enhance Visual Qualities

Posted by PeterH on 11 December 2014 - 02:36 PM

I've zero practical experience, but as I understand it you only need to slow the cooling over part firing schedule.


See for example


... and the freebies it offers.


Two examples, each shows a glaze with different firing cycles



#70099 What Type Of Glaze Is This?

Posted by PeterH on 17 November 2014 - 05:07 PM

Marcia, here's another.


Cuerda Seca - esp. applying glaze from about 3:20 and the brush used


#69988 For Christmas.

Posted by PeterH on 16 November 2014 - 04:05 AM

From http://en.wikipedia....ki/Caster_sugar

Caster (or castor[31]) (0.35 mm),[30] a very fine sugar in Britain, so-named because the grains are small enough to fit through a castor, a form of sieve. Commonly used in baking and mixed drinks, it is sold as "superfine" sugar in the United States. Because of its fineness it dissolves more quickly than regular white sugar and is thus especially useful in meringues and cold liquids. Castor sugar can be prepared at home by grinding granulated sugar for a couple of minutes in a food processor.


[31] The Oxford English Dictionary classifies both spellings as correct, but "castor" used to prevail.




#69832 Stuck In The Mold

Posted by PeterH on 13 November 2014 - 09:38 AM

Years ago I saw an article about casting something really difficult, pure alumina I think.

It had practically zero green strength, which made it difficult to extract from the mould.

So they first cast a very thin layer of paper onto the mould, then the slip. I cannot imagine

that this is too good for the mould, and it may reduce mould life by blocking the pores.


If you have a mould you are willing to sacrifice, might be worth a try. From my paperclay

making efforts I would recommend cheap white toilet-paper for making the paper-slip.

It disperses quite readily in water, espicially hot water. [Expensive zeta-potential controlled

paper pulp would presumably be better.] Perhaps you could arange only to cast paper onto

the interior part of your mould.

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