The body and glazes used by Lindsay Montgomery (for her Majolica ware)

Share from Insight-live.com (Lab Documentation and Calculation System) by Digitalfire.

See Also:
Cone 04 Terra Cotta Casting/Throwing Body, Transparent Glaze, Firing Schedule


Linda Arbuckle Majolica White

Code #

G3890

Materials Amt
Ferro Frit 3124 65.800
Minspar 200 17.200
EPK 10.800
Nepheline Syenite 6.200
Additions Amt
Tin Oxide 4.000
Zircopax 9.000
Bentonite 2.000

Total:115.00

Auto Unity Formula

CaO 0.60
K2O 0.06
Na2O 0.34
(KNaO) 0.39
B2O3 0.45
Al2O3 0.53
SiO2 3.52
SnO2 0.09
ZrO2 0.17

Ratios

Si:Al: 6.6:1
SiB:Al: 7.5:1
R2O:RO: 0.4:0.6

Expansion

7.4 (Molar:7.4)

LOI

1.9

Cost

0.10 per kg

Notes

*Lindsay Montgomery gave me her bucket of Arbuckle white from her time at Medalta July 2019. Andrea Gill uses a variation.

Specific Gravity is 1.62. She uses a concentrated Epsom Salt solution, however this is not gelling the slurry in the same way and a low-specific-gravity stoneware glaze would behave (but this needs to be applied thicker). The slurry is well suspended.

Lindsay immerses cone 04 bisque pieces in the glaze for 25 seconds! And does considerable fix-up work after to remove drips, repair pinholes, etc.

I found that with my 1850F bisque ware a 10 second dip was about right.

Anrea Gill recipe Dec 2020 is similar:

Frit 3134 32.8
Frit 3124 32.8
Neph Sy 6.3
Minspar 17.1
Tile 6. 10.8
Zircopax 14.0

Pictures

Arbuckle glaze on broken plate - Lindsay Montgomery

Majolica plate Lindsay Montgomery - Tucker PHB

Linda Arbuckle glaze. Spectrum majolica overglaze.

Tucker PHB with Linda Arbuckle base white glaze

By Lindsay Montgomery Bisque 04, glaze 05. Overglaze colors are Spectrum Majolica.

Melt flow test at cone 05

10 gram ball was melted down onto a tile. Very acute angle of contact and limited flow.

L210 with Arbuckle majolica base glaze

Fired at cone 05, bisqued at 1850, dipped for 10 seconds in 1.62 SG slurry. Melt has little fluidity and did not heal the deep holes from bubble escape.

Arbuckle majolica on L212, Sial 10F, L210

Fired at cone 05. 10 second dip. 1850 bisque. 1.62 SG slurry. After a year 10F crazed, the others did not.

Tucker PHB, L210 with Spectrum vs. Arbuckle Majolica

Spectrum has been painted on in three coats. But not nearly thick enough. Arbuckle clear was applied with a 10 second dip using 1.62SG slurry. Bisque was at 1850F. Glazed fired at cone 05.

G3890 vs. G3883 melt flow test

The Arbuckle glaze flows less and is not as white.

Arbuckle majolica fired cone 04 on Buffstone

10 second dip. Very thick application. Left bisque fired to cone 04, right cone 05. Coverage is about the same. Crazing occurred after a few weeks.

XML (to paste into Insight)

<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Linda Arbuckle Majolica White" id="159537" key="5RPiTvhK" date="2021-07-21" codenum="G3890"> <recipelines> <recipeline material="Ferro Frit 3124" amount="65.800" tolerance=""/> <recipeline material="Minspar 200" amount="17.200" tolerance=""/> <recipeline material="EPK" amount="10.800" tolerance=""/> <recipeline material="Nepheline Syenite" amount="6.200" tolerance=""/> <recipeline material="Tin Oxide" amount="4.000" added="true"/> <recipeline material="Zircopax" amount="9.000" added="true"/> <recipeline material="Bentonite" amount="2.000" added="true"/> </recipelines> </recipe> </recipes>

Born: 2019-07-29, Modified: 2021-07-21 13:13:51

Spectrum Majolica 301

Code #

G3883

Notes

*The white is very viscous yet paints on really well.
Lindsay uses the colored products to decorate the pieces.

Pictures

Spectrum Majolica glazes

L215, Buffstone with Spectrum Majolica

Shivering badly on L215. Was good on Buffstone out of the kiln, but crazed after couple of months.

G3883 Spectrum Majolica on L210

Spectrum Majolica on Tuckers PHB

G3890 vs. G3883 melt flow test

The Arbuckle glaze flows less and is not as white.

Spectrum Majolica white on L212, L210, SIAL 10F

Fired 04

Spectrum Majolica thinner and thicker on L210

Cone 04 No shivering or crazing.

L4183 with Spectrum maiolica

After a year the glaze still fit perfectly, no crazing.

XML (to paste into Insight)

Born: 2019-05-09, Modified: 2021-07-21 13:16:49

Tuckers PHB Terra Cotta

Code #

L4183

Notes

*Produces a lot of slip on throwing, messy to use.
The sample I had was very soft. It wedged well yet still felt like I had three pieces of clay on the wheel!

Drying performance is surprisingly good. Drying shrinkage is very low, given the softness and plasticity, less than 5%. Drying speed is very, very slow (so this contains significant bentonite).

Pictures

Pure RedArt on the right, this one on the left

Plastic stage. This appears to be very high in RedArt with added bentonite. It dries slowly, makes a lot of slip, these support this theory.

This body compared to Redstone

Fired Redart, Tuckers, M2 bars cone 02, 04

Top to bottom: L4170 Redart casting body L4183 Tuckers terra cotta L4184 M2 throwing body

L4183, L4184 with G2931K glaze - Cone 03

Slow cool Flawless surface. Both survived 325F to icewater test. L4184 is Plainsman L215 modified (no talc).

Majolica plate Lindsay Montgomery - Tucker PHB

Linda Arbuckle glaze. Spectrum majolica overglaze.

Arbuckle glaze on broken plate - Lindsay Montgomery

Tucker PHB with Linda Arbuckle base white glaze

By Lindsay Montgomery Bisque 04, glaze 05. Overglaze colors are Spectrum Majolica.

L4183 vs L4184 fired bars

The cone four bar, not shown here, had turned brown and was very vitreous.

L1483 with G3879 fired cone03,04

04 is milky. Some blisters. 03 is stunning, no crazing even after months.

G1916M, G2931K-fired at cone 04

Although G1916M has some boron blue, the surface is perfectly glossy. There is no crazing after several months. The G2931K has micro dimples on the surface and is beginning to craze after several months, it needs a higher temperature.

L4183 with Spectrum maiolica

After a year the glaze still fit perfectly, no crazing.

L4183 at cone 3

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
1 94.33 92.74 39.48 44.09 -5.0 5.7% 1.7% 11.7%
2 94.2 92.3 38.88 42.95 -4.0 5.8% 2.0% 10.5%
3 94.24 91.87 38.62 42.14 -3.2 5.8% 2.5% 9.1%
4 94.16 91.46 39.13 42.24 -2.0 5.8% 2.9% 7.9%
5 94.28 91.11 36.6 38.62 2.2 5.7% 3.4% 5.5%
6 94.3 90.61 38.02 39.34 3.0 5.7% 3.9% 3.5%
7 94.47 90.25 36.4 36.43 4.0 5.5% 4.5% 0.1%

SOLU - Soluble Salts

FIRE
5 nil

DFAC - Drying Factor

DFAC SOLD
1 C110- light

SIEV - Sieve Analysis 35-325 Wet

TOT 48M 65M 100M 150M
1 100 .01 .12 .26 .39

XML (to paste into Insight)

Born: 2019-06-27, Modified: 2021-07-21 13:20:01

Arbuckle Majolica Using Frit F-19

Code #

G3890A

Notes

*Done to compare the same glaze to see if the Fusion F-19 is a good substitute for Ferro Frit 3124. It appears it is.

Pictures

Arbuckle majolica white cone 05

Left: Using Ferro Frit 3124 Right: Fusion Frit F-19 Results are pretty well identical. If anything, the F-19 version might need a tiny bit more zircopax.

XML (to paste into Insight)

Born: 2021-05-30, Modified: 2021-07-21 13:14:29