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jpdes

Member Since 29 Oct 2012
Offline Last Active Today, 09:33 AM
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Posts I've Made

In Topic: University Thesis On Obtaining Red/w No Lead

12 July 2016 - 10:31 AM

Strike firing glazes is an interesting concept.  Glazenerd, do your time/temperature descriptions refer to an eg. 30 minute hold at 1350F on the cool down from a glaze firing or an entirely separate firing starting with cold, glazed ware?  Would it matter which approach was used?


In Topic: Curious Question About Heat Rate Near Cone 6 - Slower Rate - Glaze Improvement?

17 May 2016 - 10:58 AM

There's an amazing amount of information in this thread.  Thanks so much.

 

Further to the rate of firing/slow cooling concept, I have been surprised at the amount of glaze alteration that can occur on refiring Cone 6 glaze fired ware to lower temperatures.  For example to mature china paint or attach decals.  I have seen noticeable permanent visual change in glazes when refired to as low as 1450F which must be below glaze softening temperature.  This has been most noticeable in titania containing glazes.  (Thank you Joseph for alerting me to that.)

 

To guide exploration of glaze manipulation at such very low temperatures I'm interested in further information and concepts regarding

 

Lowest temperatures at which permanent glaze appearance alterations can occur?

 

Glaze ingredients and combinations which may react at these lower temperatures? 


In Topic: Curious Question About Heat Rate Near Cone 6 - Slower Rate - Glaze Improvement?

14 May 2016 - 10:23 PM

The modifier glaze effects are dramatic.  Are you willing to share more about its composition?