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SPECTRUM GLAZES:
SPECTRUM GLAZE Series: 1100 to 1192
Glaze Type: High Fire
GENERAL - We offer a selection of 77 cone 4/6 stoneware
glazes. All of these glazes, except 1189 and 1190, are lead-free
and dinnerware safe. Most of them also come with the A/P non-toxic
rating from the Art & Creative Materials Institute (ACMI) which
is clearly marked on the product label. Some of the reactive type
glazes are rated C/L by the ACMI which means that they are considered
toxic in the liquid (unfired) state due to the presence of heavy
metals, such as copper, beyond the non-toxic legal limit. C/L rated
glazes are not suitable for use by young children or pregnant women.
We have 3 types of stoneware glazes: clear glazes; plain colored
glazes; and reactive glazes. These are described in more detail
below. In general, clear glazes are used to cover designs created
with underglazes. There is a choice of gloss, satin or crackle finishes.
Our plain colored glazes are opaque and come in gloss and satin
finishes. Some of our most popular stoneware glazes are the reactive
colors which produce multi-tone and multi-colored effects by the
combination of various metal oxides. Many other interesting effects
can be created by layering these reactive glazes. In particular,
layering a more fluid glaze, such as 1173, underneath or on top
of one of the other reactive glazes often produces beautiful results.
All of our stoneware glazes are available wet in pints and gallons.
They are also available dry in 10 lb. bags. The wet glazes are set
up for brushing application. The dry glazes are set up for dipping
application. For dry glaze mixing instructions see the sheet on
"Dry Glaze Mixing Instructions" towards the end of this
Product Guide. Please follow the instructions carefully especially
with respect to the amount of water required. 
CLEAR GLAZES
1100 - Clear Gloss Glaze (cone 4/6) - An excellent lead free,
A/P non-toxic, dinnerware safe stoneware clear gloss glaze which
is compatible with most commercially available underglazes. Like
most clear glazes 1100 works best when applied thinly.
1120 - Clear Satin Glaze (cone 4/6) - Also lead free, A/P
non-toxic and suitable for use over underglaze decoration. Satin
clear glazes are not as translucent as clear gloss glazes and will
tend to mute the appearance of underglaze decoration somewhat. It
should be kept thin (i.e. 1 or 2 coats by brushing) to improve clarity.
1187 - Clear Crackle Glaze (cone 4/6) - A lead free, A/P
non-toxic clear crackle glaze. After the piece has been removed
from the kiln and allowed to cool the crackle pattern will form.
A colored dye can be rubbed into the surface to emphasize the crackle
pattern.
PLAIN COLORED GLAZES
Opaque Gloss Glazes - 1101, 1102, 1103, 1106, 1107, 1108, 1109,
1110, 1118, 1131, 1132, 1134, 1135, 1136, 1137, 1138, 1151, 1164,
1165, 1166, 1167, 1168, 1169, 1184, 1185, 1186. - A beautiful selection
of lead free, A/P non-toxic, dinnerware safe stoneware glazes with
particular emphasis on bright primary colors.
Opaque Satin Glazes - 1121, 1122, 1123, 1124, 1125, 1126, 1127.
- Smooth satin finish on these stoneware glazes which are also lead
free, A/P non-toxic and dinnerware safe.
Metallic Glazes - 1188,1189,1190 - Pewter, Gold Rain and Gold, respectively,
are beautiful metallic finishes. Please note that they are not dinnerware
safe or non-toxic and that 1189 and 1190 are our only cone 4/6 glazes
that contain lead.
REACTIVE GLAZES
Reactive Glazes - 1113, 1115, 1117, 1129, 1140, 1141, 1142, 1143,
1144, 1145, 1155, 1156, 1162, 1170, 1171, 1174, 1175, 1176, 1177,
1178, 1179, 1180, 1181, 1182, 1183. - Are all lead free, non-toxic
and dinnerware safe. They are formulated to produce reactions during
the firing cycle which give very interesting and beautiful effects.
The final appearance of the glaze is dependent on firing temperature,
glaze thickness and the composition of the clay body being used.
The same glaze can look quite different on different clay bodies.
The samples shown on the color charts are 3 brush coats of glaze
fired to cone 5 in an electric kiln on a white clay body. Different
results should be expected in reduction.
Reactive Glazes - 1111, 1148, 1152, 1153, 1154, 1157, 1158, 1159,
1161, 1172, 1173. - Are all lead free but they exceed the vanadium
and/or copper threshold limit in the liquid unfired state and therefore
are not non-toxic. However, they are all food safe if fired to the
proper firing temperature. They behave in the manner described above
for Reactive Glazes. Also be aware that some of the colors, such
as 1148, 1152, 1153, 1154, 1158, 1161, 1162, and particularly 1173
are more fluid and may run. Be more careful when using them on vertical
surfaces. Use fewer coats towards the bottom of the piece.
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