Earthenware tests 18/2

Out of the kiln this morning a number of Earthenware cone 04 glaze tests.
I'm still just trying to find successful base glazes, retesting some of the recipes I've tried before to make a base line for revisions.

All were fired to 1080 degrees Celcius on Keanes Earthenware tiles bisque fired to cone 04.

Worthington Clear 
EW cone 04

Gerstley borate     55%
Eckalite                30
Silica                    15

Results
Very clear glaze, some bubbles in suspension in thickest parts.




ABEM 
cone 04

Frit 3124               50
Eckalite                15.65
Whiting                16.65
Silica                    17.75
Total                            5

Results
Nice smooth matte glaze

EB* 
clear EW, cone 04

Frit 4131              83.3
Eckalite               16.6
* batches 2 and 3 combined and whizzed up to be smoother

Results
This seems quite matte even though its a clear recipe. Much better results from first try when I must have put incorrect amounts in. Whizzed up. Need to buy a sieve.




Julie's Satin
cone 04

Whiting                   17
Gerstley borate        27
Lithium carbonate     6
Nepheline syenite      4
Eckalite                    12
Silica                        34

Results
This glaze is still cracking. Which is a pity because I like the quality of its matte surface.
Will maybe try to modify it though I have tried before with no improvement.





Satin Base SB

Results
This is the old batch remixed. The white version of this has a tendency to late crazing which is a pity because I really like the creamy surface of this.