Coyote Glazes: Safety Info and Glazing and Firing Tips, Suggestions
Liquid Glazes
Product labeling: All of the Coyote pottery glazes have been evaluated by an independent toxicologist and are properly labeled in accordance with ASTM D-4236. In liquid form none require any warning statement other than
"conforms to ASTM D-4236".
Product Safety: All liquid Coyote glazes are non-toxic under proposed use conditions (brushing, pouring, and dipping). For spray
application warnings apply (see warnings for dry glazes). All of our glazes
are lead free, all but eighteen are cadmium free; however none of these glazes
should be taken internally as they contain ingredients not suitable for ingestion
or inhalation.
Dry Glazes and Spray Application
Product labeling; All of our lead free glazes have been evaluated by an independent toxicologist and are properly labeled in accordance with ASTM D-4236. Dry glazes have the following statement;
WARNING: This glaze contains QUARTZ (SILICA), and may contain COBALT,
CHROMIUM AND CADMIUM.
Possible cancer agent based on tests with laboratory animals.
Exposure may cause lung damage.
Keep out of reach of children.
Avoid inhalation.
Product Safety; All Coyote dry glazes contain quartz
(silica), and some contain cobalt, chromium and cadmium. Avoid creating dust,
use an OSHA approved respirator and local exhaust. All of our glazes are lead
free, all but eighteen are cadmium free; however none of these glazes should
be taken internally as they contain ingredients not suitable for ingestion
or inhalation.
Glazes containing cobalt; Blue Shino, Blue Purple, Blue Slate, Blue Matt, Ice
Blue, Opal, Pam's Blue, Purple Matt,
Oasis.
Glazes containing chromium; Almost Teal, Blue Green, Cactus Green, Chrome
Green and Pam's Green.
Glazes containing cadmium (in the form of inclusion stains); Buttercup,
Butterscotch Shino, Cedar Shino, Cherry Satin, Coral Satin, Fire Opal, Lemon
Cream Satin, Orange, Peachy Shino, Plum Shino, Pumpkin, Really Red, Red, Red Crawl, Red Orange,
Rhubarb, Sunrise Shino and Sunset
Pink.
Food Safety
Currently the only materials that are regulated by the FDA regarding
food safety in ceramic glazes are lead and cadmium.
All Coyote glazes
are lead free
, and the eighteen that contain cadmium (in the form of inclusion
stains) have, in our testing ,passed cadmium release tests when properly
fired. We also recommend that the softer (matt) glazes not be used for food
use as they may change color or texture with repeated use.
Buttercup, Butterscotch Shino, Cedar Shino, Cherry Satin, Coral Satin, Fire
Opal, Lemon Cream Satin, Orange, Peachy Shino, Plum Shino, Pumpkin, Really Red, Red, Red Crawl, Red Orange,
Rhubarb, Sunrise Shino and Sunset
Pink. contain Cadmium
in the form of inclusion stains; in our testing, all of these glazes passed
leaching tests for cadmium release, however due to the many variables in
firing, we recommend that ware produced for sale be tested by the potter
at an approved laboratory before it is marketed. You can find lab testing
information at BSCLAB
Blue Matt, Green Matt, Green Shino, Iron Matt, Purple Matt and Turquoise are
not recommended for food use. May change color or texture with
repeated exposure to food and dishwasher detergents. The Crawl glazes are not
recommended for food use.
Glazing
Some pottery glazes are very runny (see following list of info on each glaze). If you want to double dip glazes, only do so on the inside or the top
half of the exterior. If your piece is glazed right to the foot, has double or
triple dipped glaze on the whole piece or has glaze flaking off, it will
probably run.
Basic Glazing Instructions
First you want to apply wax resist to the foot of your pot (where you
don't want any glaze). When you dip your pot in a bucket of glaze, the glaze
won't stick where you have waxed. The glazes become molten glass in the kiln, so
if there is any glaze on the bottom, your pot will STICK; that wrecks your pot
and kiln shelves! Paint a thin coat of wax on the bottom, as well as up the
sides at least ¼ inch; all glazes move a little in the firing, and some are
quite runny. Always leave enough room for your glaze to flow some without
sticking to the kiln shelf. Until you are familiar with a particular glaze, it
is better to leave some extra room.
Things to remember when waxing feet:
Use a thin coat of wax, it works better. Let the wax dry for at least 15 or 20 minutes before dipping pot in glaze. Use an old cruddy brush; they are never the same after using with wax. Clean your wax brush in warm water with a drop or two of dish washing soap. Be careful not to get the wax where you don't want it, i.e. waxy fingerprints. Before you glaze your work, you should quickly rinse it under cold water. Thoroughly mix the glaze just before you use it.
Dipping
To coat the whole piece in a single glaze, the easiest technique is to
pick it up with a pair of glaze tongs, dip it in, count to three and pull it
out. Make sure to empty it as you withdraw it; if you pull a bowl out still full
of glaze it will weigh so much that the tongs will break through. Hold it upside
down over the bucket to drain the excess glaze. There will probably be some
glaze sticking to the waxed areas; wipe off what you can while you are holding
it with the tongs. Set the piece down and let it dry. After it is dry enough to
handle, turn it over and sponge off any glaze still remaining on the bottom. The
foot must be perfectly clean before it can go in a kiln.
Brushing
For brushing, most glazes need 2 to 3 coats. It is easier to get even
coverage if you brush the first coat side to side, then the next coat up and
down.
Firing
These glazes work best when fired between cone 5 and 6 (Orton large
cones); If you use a Kiln Sitter you usually have to use a cone six in the
sitter to achieve a good cone 5. For automatic kilns we fire to cone 5 (fast)
with a 15 minute hold. Every kiln is different, so you may have to fine tune
your firing to achieve the best results.
The Glazes:
Almost Teal
Single dip (2-3 coats brushed); Very stable; no running, no breaking.
Archie's Base
Single dip (2-3 coats brushed); slightly runny, breaks tan to pink. Good
over slips, underglazes and other glazes. Try it over Almost Teal, Chrome Green,
etc.
Black
Single dip (2-3 coats brushed);
Very stable, no running, no breaking. Nice under Shino or Archie's.
Blue Green
Single dip (2-3 coats brushed) Very stable, no running, no breaking.
Blue Crawl
This glaze need several coats brushing. Apply glaze until it starts to crack on
the piece when dry, like a dried-up lake bed, but not so thick that it flakes
off of the piece. Where the glaze is thicker, the crawl size is larger. Where
thinner, the crawl size is smaller. Not recommended for food use..
Blue Matt
Single dip (2-3 coats brushed) Fairly stable, light blue where thick,
yellowish where thin.
Not recommended for food use; may change color/texture.
Blue Shino
Single dip (2-3 coats brushed) Fairly stable, medium blue where thick,
breaks to orange/brown over texture and where thin.
Blue Purple
Runny! Single Dip (2-3 coats brushed) Blue purple where thin, breaking to
darker blue where thick. This glaze is very pretty if you dip the whole piece
once, then dip the rim or the top third or so a second time (not the whole
piece!). Nice when overlapped with gun metal green, red gold or archies base.
Great over almost teal.
Blue Slate Single dip (2-3 coats brushed) Fairly stable, blue-grey where thick,
breaks to dark brown over texture and where thin.
Buttercup
Single dip (2-3 coats brushed) no running, no breaking.
Cactus Crawl
This glaze need several coats brushing. Apply glaze until it starts to crack on
the piece when dry, like a dried-up lake bed, but not so thick that it flakes
off of the piece. Where the glaze is thicker, the crawl size is larger. Where
thinner, the crawl size is smaller. Not recommended for food use.
Cactus Green
Single dip (2-3 coats brushed) a little running, a little breaking
Chocolate Crawl
This glaze need several coats brushing. Apply glaze until it starts to crack on
the piece when dry, like a dried-up lake bed, but not so thick that it flakes
off of the piece. Where the glaze is thicker, the crawl size is larger. Where
thinner, the crawl size is smaller. Not recommended for food use.
Chrome Green
Single dip (2-3 coats brushed) no running, no breaking. Nice under
Archie's.
Cinnamon Stick
Single dip (2-3 coats brushed) no running,
no breaking. Red gold is very nice over cinnamon.
Clear
Single dip (2-3 coats brushed) very stable. Gets milky if applied too
thick. Good over underglazes.
Cobalt Blue
Single dip (2-3 coats brushed) no running,
no breaking. Nice under oasis blue, mottled blue, shino, etc.
Copper Blue
Runny! Single dip (2-3 coats brushed) Light blue in electric, very nice in
gas firing.
Crazed Copper
Runny!! Single dip (2-3 coats brushed) Apply a stable glaze to the bottom
1/3 of your pot, then overlap the Crazed Copper slightly (black looks good),
helps keep it from running. Fires translucent turquoise in the electric kiln,
red in the gas kiln.
Creamy Matt
Single dip (2-3 coats brushed) fairly stable, no breaking.
Creamy Matt w/Specks
Single dip (2-3 coats brushed) fairly stable, no breaking
Croc Blue
Single dip (2-3 coats brushed) no running, some breaking
Dark Brown
Single dip (2-3 coats brushed) no running, no breaking
Dark Shino
Single dip (2-3 coats brushed).
Eggplant
Single dip (2-3 coats brushed) no running, breaks to blue/green where
thin.
Eggshell
Single dip (2-3 coats brushed) no running, no breaking
Espresso Bean
Single dip (2-3 coats brushed) no running, breaks and from
dark brown to black.
Fire Opal
Single dip (2-3 coats brushed) little running, some breaking
Contains cadmium inclusion stain; lab test for cadmium release before selling
dinnerware.
Green Matt
Fairly Stable; single dip (2-3 coats brushed) Some mottling.
Not recommended for food use; may change color/texture.
Green Shino
Single dip (2-3 coats brushed) Great glaze, very reliable. Shiny green,
breaks to orange/brown where thin.
Not recommended for food use; may change color/texture.
Gun
Metal Green
Runny!! Single dip (2-3 coats brushed) Green breaks to metallic black. Nice
over other glazes, top part of piece only!
Ice Blue Runny!! Single dip (2-3 coats brushed) Lighter blue breaks to darker blue where thick. Nice
over other glazes (try it over black!), top part of piece only!
Iron Matt
Fairly stable; single dip (2-3 coats brushed) Some mottling.
Not recommended for food use; may change color/texture.
JB'S Brown
Very reliable! Single dip (2-3 coats brushed) no running, some breaking.
Light Blue
Single dip (2-3 coats brushed). No running,
no breaking.
Light Blue Shino
Single dip (2-3 coats brushed) Great glaze, very reliable, NICE over
texture, slips, underglazes and other glazes. Try it over black, red, cobalt
blue, etc.
Light Green Shino
Single dip (2-3 coats brushed) Great glaze, very reliable, NICE over
texture, slips, underglazes and other glazes. Try it over black, red, cobalt
blue, etc.
Light Shino
Single dip (2-3 coats brushed) Great glaze, very reliable, NICE over
texture, slips, underglazes and other glazes. Try it over black, red, cobalt
blue, etc.
Malt
Single dip (2-3 coats brushed) no running, no breaking.
Medium Blue
Single dip (2-3 coats brushed) no running, no breaking.
Mint Single dip (2-3 coats brushed) no running, no breaking.
Mottled Blue
Very reliable! Single dip (2-3 coats brushed) no running, some breaking.
Use with cobalt blue under or over.
Oasis Blue
Runny. Single Dip (2-3 coats brushed) Try it thicker on the inside of a
bowl and thinner on the outside so it doesn't run. Nice blue in the electric,
breaks into multiple colors in the gas. Good over slips; nice over cobalt blue
(inside only! It's runny!)
Oatmeal
Single dip (2-3 coats brushed) no running, lots of specks.
Opal
Runny. Single Dip (2-3 coats brushed) Try it thicker on the inside of a
bowl and thinner on the outside so it doesn't run. Nice varied blue.
Orange
Single dip, (2-3 coats brushed) No running, no
breaking.
Contains cadmium inclusion stain; lab test for cadmium release before selling
dinnerware.
Pam's Blue
Single dip (2-3 coats brushed) slightly runny. Breaks blue/grey/black.
Pam's Green
Single dip (2-3 coats brushed) slightly runny. Breaks green/brown/black.
Pansy Purple
Single dip, (2-3 coats brushed) No running, no
breaking.
Peaches & Cream
Single dip (2-3 coats brushed) no running, no breaking.
Pumpkin
Single dip, (2-3 coats brushed) No running,
no breaking.
Contains cadmium inclusion stain; lab test for cadmium release before selling
dinnerware.
Purple Matt
Single dip (2-3 coats brushed) no running, no breaking.
Not recommended for food use; may change color/texture.
Really Red
Single dip (2-3 coats brushed) No running,
no breaking. It's REALLY red!
Contains cadmium inclusion stain; lab test for cadmium release before selling
dinnerware.
Red Crawl
This glaze need several coats brushing. Apply glaze until it starts to crack on
the piece when dry, like a dried-up lake bed, but not so thick that it flakes
off of the piece. Where the glaze is thicker, the crawl size is larger. Where
thinner, the crawl size is smaller. Not recommended for food use.
Contains cadmium inclusion stain
Red
Single dip (2-3 coats brushed) No running,
no breaking.
Contains cadmium inclusion stain; lab test for cadmium release before selling
dinnerware.
Red Gold
Runny!! Single dip (2-3 coats brushed) Breaks to blue where thick. Nice
over other glazes. Try it over cinnamon stick, top part of piece only!
Red Orange
Single dip (2-3 coats brushed) No running, no breaking.
Contains cadmium inclusion stain; lab test for cadmium release before selling
dinnerware.
Rhubarb
Single dip (2-3 coats brushed); slightly runny, breaks tan to deep pink. Good
over slips, underglazes and other glazes. Try it over Almost Teal, Chrome Green,
etc.
Contains cadmium inclusion stain; lab test for cadmium release before selling
dinnerware.
Royal Blue
Single dip (2-3 coats brushed) no running, no breaking.
Rust Brown
Single dip (2-3 coats brushed) Fairly stable, don't apply too thin.
Breaks brown to tan.
Saturated Iron
Single dip (2-3 coats brushed); slightly runny. Try it under shino.
Shino
Single dip (2-3 coats brushed) Great glaze, very reliable, NICE over
texture, slips, underglazes and other glazes. Try it over black, red, cobalt
blue, etc.
Sunset Pink
Single dip (2-3 coats brushed) little running, some breaking, Contains
cadmium inclusion stain; lab test for cadmium release before selling
dinnerware.
Toshi Brown
Single dip (2-3 coats brushed) No running, some breaking..
Turquoise
Single dip (2-3 coats brushed) don't apply to thin .No running.. Some red
in the gas kiln.
Not recommended for food use; may change color/texture.
Violet
Single dip (2-3 coats brushed) No running, no
breaking.
Waxy Lavender
Single dip(2-3 coats brushed) No running, no
breaking.
White Single dip (2-3 coats brushed) no running, no breaking.
White Crawl
This glaze need several coats brushing. Apply glaze until it starts to crack on
the piece when dry, like a dried-up lake bed, but not so thick that it flakes
off of the piece. Where the glaze is thicker, the crawl size is larger. Where
thinner, the crawl size is smaller. Not recommended for food use.
Yellow Orange
Single dip (2-3 coats brushed) No running, no
breaking.
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