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Minnesota Clay Glazes & Underglazes  

Minnesota Clay Co. USA's glazes and underglazes have been formulated for over 50 years for use on clay bodies of corresponding temperature range.

Minnesota Clay Co. USA’s glazes have been formulated for over 50 years for use on clay bodies of corresponding temperature range. While offering a wide range of color surface qualities. All glazes are lead-free. Glazes are sold wet or dry, with suspension and binding agents added where needed. They are formulated for an oxidation atmosphere, although some stoneware glazes may yield favorable results in reduction. See page 92 for helpful glaze hints. We also offer a line of economically priced underglazes good for school or production use.

Minnesota Clay also offers a line of unique specialty products. We have Potter’s Pads which are stamping ink pads, Potter’s Slip to do slip trailing, Potter’s Pen which is an underglaze pen, Choxils which are underglaze chalk, Graffi to which is a carbon paper that allows you to transfer images to your pieces, and fi nally, Rainbow Air-Dry clay which works especially well for grade school students. We do believe and recommend that you test all clay bodies to insure desired results.

MSDS Sheets
Material Safety Data Sheets are available by contacting our customer service department or visiting our website at
www.mnclay.com/msds/msds.html.

Special Mixes
Minnesota Clay has been mixing both wet and dry glazes for customer for 50 years. Our experienced staff will custom mix glaze per your recipe. Please call Customer Service for pricing and scheduling.

Why should we glaze our pots?
Historically, most pottery was glazed to increase its function. Glazing provides a hard, water tight, scratch resistant, and sanitary surface. In addition, a properly formulated glaze also strengthens a piece of ware. Glazing gives us more control over the aesthetics of our pieces. We can decide color, surface, and any decorative elements we want to add to our work. Glazes can produce a variety of surface finishes, including degrees of gloss and matte, variegation and finished color. Glazes may also enhance an underlying design or texture which may be either the "natural" texture of the clay or an inscribed, carved or painted design. Finally, keep in mind that we don't have to glaze our pots. Raw clay can be quite beautiful, and it can be decorated in many ways that don't require glaze.

 
Earthenware Glazes Stoneware Glazes Underglazes Supplemental Information
Cone 06-04 Cone 5-9 Cone 06-9 Info on Glaze Application

Minnesota Clay Earthenware Glazes

G Series 

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G Series opaque gloss glazes fire from cone 06 to 04 and are leadless.

Opacity is the property of being opacified, or the degree to which a glaze is non-transparent. Opacity is achieved by the deflection of light, either by the suspension of vey fine bubbles or particles in the glaze, or by the formation of crystals in the glaze.

G2 Gloss White G3 Lemon G4 Spearmint G5 Burgundy G6 Midnight Black G7 Grape G8 Grasshopper
Gloss
White 
Lemon Spearmint Burgundy Midnight
Black
Grape Grasshopper
             
G9 Dark Forest G10 Turquoise G11 Sky Blue G12 Teal Blue G13 Georgia Peach G14 Deep Blue Gray G15 It's A Boy
Dark
Forest 
Turquoise Light
Blue
Teal
Blue
Georgia
Peach
Deep
Blue Gray
It's A Boy
             
G16 Hershey Bar Brown G17 Deep Red Brown
Hershey Bar Brown  Deep Red Brown
 
Bonus Offer
Class Packs Low Fire Pack #1 Low Fire Pack #2 Low Fire Pack #3

3 different packs with G and T Series glazes.
There are six pints in each pack.

Low Fire Pack #1 Low Fire Pack #2 Low Fire Pack #3

T Series 

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T Series transparent gloss glazes fire from cone 06 to 04 and are leadless.

Transaprent glazes are simply a clear glass, which allow slip or underglaze decoration to be seen. Small quantities of colour may be added to the basic recipe to give a coloured transparent glaze, such as those found in our T-Series glazes, and these are very suitable for textured surfaces or pieces with carved detail.

T1 Clear T2 Yellow Gold T3 Sun Yellow T4 Buckskin T6 Royal Blue T7 Olive Raspberry
Clear  Yellow
Gold
Sun
Yellow
Buckskin Royal Blue Olive Raspberry
             
T9 Pumpkin T10 Cherry
Pumpkin  Cherry

M Series 

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M Series matt glazes fire from cone 06 to 04 and are leadless.

Matte describes a particular glaze surface which is non-glossy, dry-looking, and feels somewhat rough to the touch. Matte surfaces include semi-matte, which is just slightly drier and rougher than semi-gloss glazes, matte, and stony matte, which is very rough and almost granular in feel and visual texture. Matt glazes are made up of tiny crystals which form in the glass. The smaller the crystals, the smoother the glaze. Vellum or Satin Matts are the smoothest. Matt glazes are highly suitable for sculptural work, and generally not recommended to come in contact with food.

M1 Mist Gray M2 Metallic Slate M3 Porcelain M4 Butterscotch M5 Faience Blue M9 Danish Green M10 Seal Brown
Mist
Gray 
Metallic
Slate
Porcelain Butterscotch Faience
Blue 
Danish
Green
Seal
Brown

Minnesota Clay Stoneware Glazes

HG Series

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HG Series glazes are leadless, opaque and should be fired from cone 5-8 except HG4 should be fired cone 4-5.

Opacity is the property of being opacified, or the degree to which a glaze is non-transparent. Opacity is achieved by the deflection of light, either by the suspension of vey fine bubbles or particles in the glaze, or by the formation of crystals in the glaze.

HG1 Soft White HG2 Dark Blue HG3 Light Blue HG4 Second Hand Rose HG5 Iron Red HG6 Copperhead HG7 Gloss White
Soft
White 
Dark
Blue
Light
Blue
Second
Hand Rose
Iron Red Copperhead Gloss
White 
             
  HG11 Light Rust HG12 Metallic Green HG13 Banana HG14 Oil Spot Black HG16 Light Beige  
  Light Rust  Metallic
Green
Banana Oil Spot
Black
Light
Beige
 
             
Bonus Offer 
Class Packs  HG Series 5 Pack HG Series 10 Pack
HG Series pint class pack. We offer a 5 pack or a 10 pack. HG Series 5 Pack HG Series 10 Pack

BT Series

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BT Series glazes are transparent and glossy. Should be fired from cone 6-9.

Transaprent glazes are simply a clear glass, which allow slip or underglaze decoration to be seen. Small quantities of colour may be added to the basic recipe to give a coloured transparent glaze, such as those found in our BT-Series glazes, and these are very suitable for textured surfaces or pieces with carved detail.

BT1 Clear BT2 Mauve Red BT3 Purple BT4 Fool's Gold BT5 Salmon BT7 Aqua BT8 Royal Blue
Clear Mauve
Red
Purple Fool's Gold Salmon Aqua Royal Blue 
BT9 Teal BT10 Robin's Egg Blue BT11 Heavy Rust BT12 Black BT13 Citrus Burst BT14 Dragon's Breath  
Teal  Robin's
Egg Blue 
Heavy Rust Black Citrus
Burst 
Dragon's
Breath
 

SG Series 

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Slip Glazes should be fired from cone 5-8 have flowing textures and are great for overlapping HG-Series glazes.

Slip glazes are glazes with slip or clay contributing the primary flux.

SG1 Creamy Caramel SG2 Nebula SG3 Blue Ice SG4 New Albany Brown SG5 Celestial Blue
Creamy
Caramel 
Nebula Blue Ice
Temporarily Unavailable
New Albany
Brown
Celestial Blue

NG Series 

Buy Now
We are proud to have released 17 new high fire glazes, over the last few years. At this time the following glazes are for decorative purposes only; Midas' Touch, Blue Jean, Caribbean Green, Mint Texture and Metallic Black.
 
NG1 Midas' Touch NG2 Sea Mist Green NG3 Blue-Gray Speckle NG4 Sapphire Blue NG5 Blue Jean NG6 Red Planet NG7 Blueberry
Midas'
Touch 
Sea Mist
Green
Blue-Gray
Speckle
Sapphire
Blue
Blue
Jean
Red
Planet
Blueberry
             
NG8 Sage NG9 Carribean Green NG10 Espresso Mint NG11 Sandstorm NG12 Floating Blue NG14 Charcoal NG15 Mint Texture
Sage  Caribbean
Green
Espresso Sandstorm Floating Blue Charcoal Mint Texture
             
NG16 Metallic Black NG18 Tarnished Brass NG19 Speckled Ivory        
Metallic Black Tranish Brass Speckled Ivory        

HM Series 

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HM Series glazes have a matt finish and opaque. Should be fired from cone 6-9.

Matte describes a particular glaze surface which is non-glossy, dry-looking, and feels somewhat rough to the touch. Matte surfaces include semi-matte, which is just slightly drier and rougher than semi-gloss glazes, matte, and stony matte, which is very rough and almost granular in feel and visual texture. Matt glazes are made up of tiny crystals which form in the glass. The smaller the crystals, the smoother the glaze. Vellum or Satin Matts are the smoothest. Matt glazes are highly suitable for sculptural work, and generally not recommended to come in contact with food.

  HM1 Matte White HM2 Manazrine Blue HM4 Waxy Black HM5 Straw Tan HM10 Slate Green  
  Matte
White 
Manzarine
Blue 
Waxy
Black 
Straw
Tan
Slate
Green
 

Minnesota Clay Underglazes

Underglazes

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19 economically priced colors for school and production use. All colors fire cone 06-9 except Rose which only fires up to cone 4.

Underglazes are used in pottery to create designs and patterns that will come up through the glaze covering them, which can give the surface more visual depth and character. Although they are often used under clear glazes, they can also be used under other, generally light colored, transparent glazes. But, what are "underglazes"? There are different types, and they can be confusing.

"Underglaze" as a term can mean any decoration that is applied, almost always in a fluid form, on the pottery surface before any glaze is applied. In this blanket sense, underglazes can encompass slips, engobes, and stains, as well as products that are marketed as underglazes.

Black Underglaze Blue Underglaze Bright Red Underglaze Brilliant Orange Underglaze Brown Underglaze Dark Blue Underglaze Gold Underglaze
Black  Blue Bright
Red
Brilliant
Orange
Brown Dark
Blue
Gold
             
Gray Underglaze Green Underglaze Lavender Underglaze Orange Underglaze Pink Underglaze Red Underglaze Rose Underglaze
Gray  Green Lavender Orange Pink Red Rose
             
  Terra Cotta Underglaze Teal Underglaze Turquoise Underglaze White Underglaze Yellow Underglaze  
  Terra
Cotta 
Teal Turquoise White Yellow  
             
Bonus Offer
Class Packs Underglaze Class 6 Pack Underglaze Class 12 Pack 
Underglaze Class Pack come in 6 or 12 packs.
We offer both in 2 oz. and pint quantities. 
Underglaze 6 Pack Underglaze 12 Pack

Supplemental Glaze Information
Dipping Glazes 101
An article that gives you helpful hints on dipping all types of pieces. 
 
Earthenware Glazes
Additional information about mixing and characteristics of our earthenware glazes.
 
Stoneware Glazes
Additional information about mixing and characteristics of our stoneware glazes.
 
Material Safety Data Sheets