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Albany Slip Clay Substitute:
Slip Clay was used extensively to create stoneware, eathenware and salt
glazed pottery from the early 1800s until the mine was closed in 1986.
It was also commonly used over cast porcelain insulators and other
utilitarian objects alone and in combination with other high-iron
glazes. As a glaze or glaze ingredient it creates dark brown as seen on
early American jugs, salt glazed pottery and stoneware pots. Albany
slip was also used to glaze the insides of pots as it's hard glassy
finish made it ideal for food storage. Although many potters are now
using Alberta Slip to fill the role of Albany Slip it is not as similar
to the original as the Sheffield Albany Slip Substitute under analysis.
Sheffield Albany slip substitute is near identical to Albany Slip in
chemical composition. (See Chemical Analysis below)
Incorporated has developed an Albany slip substitute
utilizing a native glacial clay (see Sheffield clay) blended with fluxing agents. This slip glaze produces a rich
brown semi glossy glaze at cone 9/10 which mimics Albany slip glaze in
reduction and oxidation firings.
If the Albany Slip was a large percentage or even 100% as a glaze,
you can use our ALBANY SUBSTITUTE. This material is a glaze formula
based on Sheffield Slip Clay. It is thoroughly tested and yields a
glaze designed to duplicate 100% Albany at cone 10. Depending on the
application the formula can be used as a component in various
temperature glazes including tenmoku (or temmoku: Jian Yao) and bean pot glazes.
You can add between 7.5 and 20% of ferro frit 3134 or equivalent to flux our sub down to mid-fire cone 6.
Always do a series of test tiles for your specific firing regime to find the right proportion to achieve your desired look.
See picture of our tests results at cone 6 in oxidation below.
Shown right: Unsigned 19th Century Jug with typical Albany Slip Glaze.
Shown below : cone 6 oxidation fired test tiles of Albany Slip and Sheffield Albany Slip Substitute using various percentages of flux. (On white stoneware)
Shown below: Cone 10 Oxidation Fired Samples of various commercially available Albany Slip Substitutes over Sheffield Porcelain showing similarity of Sheffield Albany Slip Substitute and original Albany Slip.
Note: Price Shown is per pound. Use the View Quantity discounts Button to see extended discounts.
For 50 Pound bags use RMALBSUB50
SUBSTITUTE vs. ORIGINAL ALBANY CHEMICAL
| Chemical || Sheffield Albany Substitute || Albany Slip Clay |
| || |
| SiO2 || 60.94|| 57.82|
| AL2O3 || 16.08|| 14.63|
| FeO|| 2.63|| |
|Fe2O3|| 3.37|| 5.21|
| MgO|| 5.09|| 2.71|
| CaO|| 6.39|| 5.81|
| K2O|| 3.40|| 3.2|
| Na2O|| 1.10|| 0.8|
| TiO2|| 1.00|| 0.4|
Sheffield Albany Slip Sub EMPIRICAL