Partial Results from Clear Glaze Finish on Tiles @ 06

[Decoplaqs]

I low fired my first batch of tiles yesterday only to find out today that most of each tile had a gloss shiny finish but various areas of the tile seemed like it was still like bisque in look and feel. I was thinking I either... 

1. did not put enough clear coat on the tiles (only applied 1 heavy coat) of Amaco Transparent Clear on the bisque colored items and the tiles certainly looked like chalky when dry...So I assumed it was enough clear glaze....

or maybe

2. I set the kiln timer to 6 hrs. and it turned off not fully heating the glazed tiles all the way... thus only each tile was partially finish glazed..

If anyone can provide any input I would be so thankful. Additionally, The colored tiles that have been fired and partially finish glazed...Can I apply more glaze and fire again to fully glaze the tile and save the work. Thank so much....  dante.rushmyorder@gmail.com 

[Babs]

Diid you have coloured slip on tiles?

Are you brushing glaze on. Best to apply 2-3 coats from different directions.

Lay on as opposed to brush on..

A picture would help with possible reasons.

Some colours need a bit of frit added..

Pic essential really

[oldlady]

did you read the instructions on the amaco clear glaze?   why did you set a timer?   what instruction have you had in firing pottery?

if you can provide more information on the kiln you might find out more answers to your questions.

[Hulk]

Hi Dante!

How are you measuring temperature and heat work (time and temperature) - are you using witness cones? Seeing any variation in results associated with position in the kiln? What clay(s) are you using?