SPECIALTY PRODUCTS     

Series: 120,122,138,144,145,170,817,818
Glaze Type: Low Temperature
 

SEMI-TRANSPARENT COPPER GREENS

817,818 - Although they are lead-free these popular greens exceed the copper threshold limits in the liquid, unfired state and therefore are NOT non-toxic. However, they are dinnerware safe if fired to the proper firing temperature. 817 also produces interesting results in Raku firings.

CRACKLE GLAZES

138,170 - Although they are lead-free and non-toxic, they are not dinnerware safe because of the possibility of bacteria growth in the cracks. After they have been fired to cone 06/04 and allowed to cool you can rub ink or dye into the cracks, in order to make the crackle pattern stand out the way it does in our color charts.

METALLIC GLAZES

144,145 - Since they contain fritted LEAD, they are NOT non-toxic or dinnerware safe. 144 Pewter is quite a stable formulation and performs well at cone 06 to 04. 145 Bronze is a more sensitive glaze. It provides a beautiful golden bronze finish, if the thickness and firing temperature are correct. It needs to be applied heavily (i.e. 4 coats by brushing) and it needs to be fired hotter than normal (i.e. may require cone 03 or even cone 02).

CADMIUM LEAD GLAZES

120,122 - They both contain fritted LEAD and CADMIUM and are NOT non-toxic or dinnerware safe. Unfortunately, this is still the only way to get these brilliant reds and oranges. These cadmium glazes are sensitive to glaze thickness and firing temperature. If the glaze is too thin the color may go silver in some areas. If the glaze is too thick or the temperature is too hot, black spots may develop. They should not be fired above cone 06. Also, a good supply of oxygen improves the firing characteristics of the two colors, so keeping peepholes open or ensuring that the kiln is not too densely loaded will help to get consistent results.
 

General Information:
    Magnolia Pottery Supply stocks Spectrum Specialty Products Glazes in pint sizes.