Slip Recipes for Soda

[Emily Murphy]

I would love it if people would share some slip recipes that they use. Here are some to get us started!

Mustard Slip
Thin
Can be applied thinly to bisque

OM4 90
Neph Sy 10
Titanium Dioxide 10

7x Slip
Thick
best when hit with heavy soda

Neph Sy 33
Helmer Kaolin 33
Silica/ flint 33
Light rutile 15

Shino Slip
Thick
best applied with coarse, textured brush
dissolve soda ash in hot water, separately

F4 Feldspar 11
Amblygonite 15
Soda ash 4.
Neph Sy 45.
OM4 15
EPK 35

Smooth Orange
Thin
Can be applied thinly to bisque

EPK 40
OM4 40
Borax 5 (Dissolve in hot H2O)
Zircopax 10

Thompson Flashing Slip
MUST be sieved
Crackles when applied in many layers

EPK 70
Neph Sy 30

Thompson's Deep Turquoise
3% Deep Turquoise mason stain added to it.

Tile 6 Slip
Thick
Orange/ yellow flashing
Needs a lot of soda

Tile 6 clay 100
Bentonite 6%

[John Anthony]

Grolleg/Ball Slip yellow/tan/brown

medium - apply to leather hard ware

Grolleg 57
Om 4 35
Neph Sy 8

[jane g. miller]

Stick to Anything White
EPK 50
Ball Clay 50
Silica 50
Cornwall Stone 25
Neph Sy 75

[jane g. miller]

Avery Slip
Avery Kaolin 10
NC-4 4.5
Ball Clay 3
Silica 3
Bentonite 0.5

[jane g. miller]

Helmar Slip
Helmar 10
NC-4 Spar 4.5
Ball Clay 3
Silica 3
Bentonite 0.5

[Colleen Riley]

Here is a nice flashing slip, similar to shino slip.
OK on bisque if thin, or on leatherhard:

Amblygonite (low melt spodumene) slip
Soda feldspar 108
Spodumene 72
Low-melt spodumene 80
Soda ash 40
Neph Sy 450
OM4 Ball Clay 150
EPK 350

[Colleen Riley]

Vitreous engobes
These are great with colorants... I've had success adding Mason stains, etc.
(using Mason stain colorants in soda firings is probably best for a separate discussion)
If used alone, they are like a white-tan slip glaze (too much flux for good flashing).
I find them to be very versatile for leatherhard to bisque application. They fire to a nice satiny surface when used alone (but the colorants are generally more consistent when used under a glaze).
I'll post pics soon of these slips in action...colleen
____________________________
'A' (variation of Susan Peterson engobe)
Ball Clay 35
Whiting 10
Neph Sy 25
Flint 20
Lithium Carb 5
Borax 5 (Gerstley Borate or Frit substitute is easier)
Zircopax 5
________________________________
Wood Ash Engobe
Ball Clay 30
Talc 15
Wood Ash (unwashed) 20
Cornwall Stone 25
Gerstley Borate substitute 10 (or frit 3134)
_________________________
Wollastonite engobe
Variation of wood ash slip (the above slip is a little difficult to apply smoothly, so I'm trying wollastonite as a sub. for ash. I'm still tweaking to get the right clay:flux but it's promising...)
Talc 10
Wollastonite 25
Cornwall Stone 25
Frit 3134 10
Ball Clay 30

[Deborah Woods]

I don't know much about the techs of soda firing, but none of these slips are posted with a temperature. Is there only one temperature people fire to when soda firing-or would these slips be appropriate if going to cone 6 or cone 10?

[Emily Murphy]

I fire to c. 10, so I know that the slips that I posted are good at c. 10. But some of them might be fine at lower temps.

[Colleen Riley]

The vitreous slips are used in cone 10 as well, but could likely be modified for cone 6 (let me know if you'd like suggestions on how to do that).

[jane g. miller]

the ones i posted i fire anywhere from cone 8- cone 12- depending on the firing. they should be fine at cone 6- the only concern would be that they are formulated to match or fit a cone 10 body- so you would want to test them to see how they fit a cone six body- and the depth of the flashing may not be as much at cone 6.

[bryce brisco]

here are a few of my favorites, all of which i would recommend be mixed with distilled or purified water. i have lived and worked in different regions of the country in the last few years and had some hard vs. soft water issues. All recipes i have used on stoneware, Cone 10, salt , soda and wood. I mostly slip at leather hard, but Bauer, Titanium Yellow, and Silverman, will all work on bisque.

johnston flashing slip

grolleg 50
newman red fire clay 10
epk 10
neph sye 30

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titanium yellow slip

neph sye 31.58
Tenn. ball clay #10 63.1
Silica 325 5.2
super pax 5.26
titanium 10.53

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Bauer Slip

Om4 42
Epk 42
zircopax 11
borax 5

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Tile 6

Tile6 61.1
glomax 10.2
grolleg 15.3
silica 325 5.1
neph sye 8.3

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Silverman Slip (bright orange)

Alumina 20
Epk 40
XX Saggar 40
Kona F4 10

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Orange to White Crackle
(for some reason this is in lbs, and adds up to 34?!)
Borax .75
zircopax .75
custer 3
calcined Kaolin 3
EPK 2.25
OM4 21.25
Silica 325 3

-----------------------

Oestreich Crackle (for use only on bisque)

grolleg 20
G200 20
Silica 325 20
Epk 15
OM4 15
Ziropax 5
Borax 5

[Mark Peters]

Here's my leathery slip recipe:
Apply leather hard
silica 30
ball clay 30
epk 20
neph sy 20
red iron ox 9
bentonite 2

This cup was fired in my cross draft wood/ soda to cone 11. Soda was introduced through the firebox.