[Clayart] water in mugs

[ronroy at ca.inter.net]

Hi Bruce,

Perhaps I am misunderstanding something here. If the glaze is not  
crazed how would the steam get out at the handle?

RR


Quoting "Girrell, Bruce" <bigirrell at microlinetc.com>:

> David,
>
> In the spirit of all things Hendley, I propose a very simple test,  
> the same one we would use to test for dryness when firing a load of  
> bisque - the classic mirror near the peep trick.
> Get a troublesome mug, heat it in the microwave in a way that has  
> produced "too hot to touch" in the past, then quickly place a cool  
> mirror near a place where you would normally touch the mug. Look for  
> fog.
>
> Bruce Girrell
>
>
>
> -----Original Message-----
> From: Clayart [mailto:clayart-bounces at lists.clayartworld.com] On  
> Behalf Of David Hendley
> Sent: Wednesday, November 09, 2016 6:51 PM
> To: Clayart international pottery discussion forum  
> <clayart at lists.clayartworld.com>
> Subject: Re: [Clayart] water in mugs
>
> Yes Bruce, that  is my conclusion, but it is not a scientific conclusion.
> Thinking about it, I don't know how you could test this "steam hypothesis".
> Also, note: Thinking about what I wrote earlier, "blister on your  
> finger from a millisecond of contact", I meant "millisecond" in the  
> casual conversational sense - a short period of less than one  
> second, not a true millisecond...
>
> David Hendley
> david at farmpots.com
> http://www.farmpots.com
>
>
>
>
> ----- Original Message -----
>
>> David Hendley wrote:  if you have never picked up an unvitrified mug
>> full of absorbed water out of the microwave - it is unbelievably hot,
>> not at all like a mug with heat transferred from the hot coffee in the
>> mug to the handle.
>>
>>
>> Which would lead us to conclude, then, that it is not the ceramic
>> object itself that is doing the burning, but rather live steam.
>> Therefore, computations of the amount of water compared to the mass of
>> the mug will be misleading. It would take only a small amount of steam
>> to create enough pain to make you drop the cup instantly and possibly
>> cause blistering
>>
>> Bruce Girrell
>>
>>
>>
>
>
>
>



Ron Roy
ronroy at ca.inter.net
Web page ronroy.net