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Orton's
Artist Corner

This page contains information for ceramic artists of all skill levels. Whether it's your first time using Orton's Pyrometric Cones, or you're a seasoned expert, Orton can help you achieve your firing goals.

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What Orton Cones are used by Ceramic Artists?
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What Orton Cones are used by Ceramic Artists?

How to Install Your Orton Vent Master
10:12
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How to Install Your Orton Vent Master

Why Use Self Supporting Cones?
01:34
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Why Use Self Supporting Cones?

Troubleshooting Kiln Firing Issues
02:36
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Troubleshooting Kiln Firing Issues

  • Arizona
    Marjon Ceramic Shop - Phoenix 3434 W. Earll Drive Suite 101 Phoenix, AZ 85017 602-272-6585 marjonpx@marjonceramics.com www.marjonceramics.com Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Marjon Ceramics - Tucson 426 W Alturas Tucson, AZ 85705 520-624-2872 maejontn@marjonceramics.com www.marjonceramics.com Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • California
    Aardvark Clay & Supplies 1400 East Pomona St. Santa Ana, CA 92705 714-541-4157 contact@aardvarkclay.com www.aardvarkclay.com Products Offered: AutoFire Controllers VentMaster Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Clay People 623 S. 32nd Street Richmond, CA 94804 510-236-1492 people@claypeople.net www.claypeople.net Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Creative Ceramics and Glass 5240 Aero Drive Santa Rosa, CA 95403 707-545-6528 707clayinfo@gmail.com www.creativeceramicsandglass.com Products Offered: VentMaster Kiln Vent Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Laguna Clay Co. (National Headquarters) 14400 Lomitas Avenue City of Industry, CA 91746-3018 626-330-0631 marketing@lagunaclay.com www.lagunaclay.com Products Offered: Large Cones Self-Supporting Cones Pyrometric Bars Small Cones Vent Master Alpha Fired Arts 4675 Aldona Lane Sacramento, CA 95841 916 484-4424 www.alphafiredarts.com Online Store: www.ceramicsuppliesnow.com Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Arrow Springs 331 Industrial Dive - Suite 2 Placerville, CA 95667 530-344-9219 info@ArrowSprings.com www.arrowsprings.com Products Offered: Orton AutoFire Kiln Controllers Ceramics & Crafts Chino 13595 12th Street Chino, CA 91710 909-627-4139 lkelly@ceramicscrafts.com jramirez@ceramicscrafts.com Products Offered: Self-Supporting Cones Pyrometric Bars Small Cones Geil Kilns 7201 Clay Avenue Huntington Beach, CA 92648 714-847-6135 geil@kilns.com www.kilns.com Products Offered: VentMaster Kiln Vents
  • Colorado
    Continental Clay Co. 5303 East 47th Ave Unit N Denver, CO 80216 303-355-9332 sales@continentalclay.com www.continentalclay.com Products Offered: VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Rocky Mountain Clay 1220 West 1st Avenue Denver, CO 80223 303-805-0516 https://rockymountainclay.com clay@rockymountainclay.com Products Offered: VentMaster Kiln Vents https://rockymountainclay.com/product/orton-vent-master/ Self-Supporting Cones Large Cones Small Cones
  • Florida
    Highwater Clays of Florida Inc. 3635 131st Avenue N Clearwater, FL 33762 727-553-9344 hwcflorders@gmail.com www.highwaterclays.com Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Laguna Clay Co. (Florida) 490 Kane Court Oviedo, FL 32765 407-365-2600 marketing@lagunaclay.com www.lagunaclay.com Products Offered: Large Cones Self-Supporting Cones Pyrometric Bars Small Cones Vent Master Atlantic Pottery Supply 1904 Debarry Ave. Orange Park, FL 32073 904-249-4499 creations@atlanticpotterysupply.com www.atlanticpotterysupply.com Products Offered: Large Cones Pyrometric Bars Claudia's Mud Hut 195 Campbellton Lane Pensacola, FL 32506 850-455-1769 ClaudiasMudHut@gmail.com https://claudiasmudhut.wixsite.com/mysite Products Offered: Self-Supporting Cones Pyrometric Bars Florida Clay Art Company 1645 Hangar Road - Suite 103 Sanford, FL 32773 407-330-1116 orders@flclay.com www.flclay.com Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Rob's Kiln Service 13995 Antiqua Drive Seminole, FL 33776 727-798-1053 rbushee@tampabay.rr.com Products Offered: AutoFire Kiln Controllers VentMaster Kiln Vents
  • Georgia
    Davens Ceramic Center 5076 Peachtree Road Atlanta, GA 30341 800-695-4805 davens@davensceramiccenter.com www.davensceramiccenter.com Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Olympic Kilns 4225 Thurman Tanner Road Flowery Branch, GA 30542 770 967-4009 info@greatkilns.com www.olympickilns.com Products Offered: VentMaster Kiln Vents Large Cones Small Cones
  • Illinois
    Blick Art Materials RT 150 Knoxville Road Galesburg, IL 61402 309-343-6181 info@dickblick.com www.dickblick.com Products Offered: VentMaster Kiln Vents Self-Supporting Cones Pyrometric Bars Small Cones Chicago Kiln Service 2312 Wing Street Rolling Meadows, IL 60008 847-436-0919 carl@chicagokilnservice.com www.chicagokilnservice.com Products Offered: Orton AutoFire Kiln Controllers VentMaster Kiln Vents
  • Indiana
    American Art Clay 6060 Guion Road Indianapolis, IN 46254 800-374-1600 salessupport@amaco.com www.amaco.com Products Offered: AutoFire Kiln Controllers VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • Kansas
    Bracker's Good Earth Clays Inc. 1831 E 1450 Road Lawrence, KS 66044 785-841-4750 mail@brackers.com https://shop.brackers.com/search.php?search_query=orton&section=product Products Offered: VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Evans Ceramic Supply 1518 S. Washington Wichita, KS 67211 316-262-2551 don@evansceramics.com https://evansceramics.com/ Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • Louisiana
    Creative Crafts 9370 Florida Blvd Baton Rouge, LA 70806 225-344-9831 www.creative-crafts.com Products Offered: Self-Supporting Cones Pyrometric Bars Small Cones
  • Maine
    Portland Pottery Supply 220 Anderson St Portland, ME 04101 207-772-4334 salescounter2@portlandpottery.com www.portlandpottery.com Products Offered: VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • Maryland
    Chesapeake Ceramics 4710 Benson Avenue Halethorpe, MD 21227 410-247-1270 www.chesapeakeceramics.com Products Offered: VentMaster Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Clayworks Supplies 4625 Falls Road Baltimore, MD 21209 410-235-5998 clayworks@clayworkssupplies.com www.clayworkssupplies.com Products Offered: VentMaster Kiln Vents Large Cones Pyrometric Bars Maryland China Co., Inc. 54 Main Street Reistertown, MD 21136-0307 410-833-5559 info@marylandchina.com www.marylandchina.com Products Offered: Large Cones Small Cones
  • Massachusetts
    Amherst Potters Supply 47 East Street Hadley, MA 01035 413-586-4507 clay@amherstpotters.com www.amherstpotters.com Products Offered: VentMaster Vents Self-Supporting Cones Large Cones Pyrometric Bars Sheffield Pottery Inc. US Rt. 7 Sheffield, MA 01257 413-229-7700 info@sheffield-pottery.com www.sheffield-pottery.com Products Offered: VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Small Cones
  • Michigan
    Evenheat Kiln Company 6949 Legion Road Caseville, MI 48725 989-856-2281 info@evenheat-kiln.com www.evenheat-kiln.com Products Offered: VentMaster Kiln Vents Runyan Pottery Supply 820 Tacoma Court Clio, MI 48420 810-687-4500 sales@runyanpotterysupply.com www.runyanpotterysupply.com Products Offered: VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • Minnesota
    Continental Clay Co. 1101 Stinson Blvd NE Minneapolis, MN 55413 612-331-9332 sales@continentalclay.com www.continentalclay.com Products Offered: AutoFire Kiln Controllers VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Minnesota Clay Company 2960 Niagara Lane Plymouth, MN 55447 763-432-0875 orders@mnclay.com www.mnclay.com Products Offered: Self-Supporting Cones Large Cones Small Cones
  • Mississippi
    Dogwood Ceramic Supply 12590 Dedeaux Road Gulfport, MS 39503 228-831-4848 steven@dogwoodceramics.com www.dogwoodceramics.com Products Offered: AutoFire Kiln Controllers VentMaster Kiln Vents Self-supporting Cones Pyrometric Bars Small Cones
  • Missouri
    Bracker's KC 1611 Crystal Avenue Kansas City, MO 64126 888-822-1982 mail@brackers.com www.brackers.com Products Offered: AutoFire Kiln Controller VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Krueger Pottery 1449 Stassner Drive Brentwood, MO 63144 314-963-0180 sales@kruegerpottery.com www.kruegerpottery.com Products Offered: VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars
  • Montana
    Archie Bray Foundation 2915 Country Club Ave Helena, MT 59602 800 443-6434 claybiz@archiebray.org https://archiebrayclay.com/ Products Offered: Large Cones Pyrometric Bars
  • Nebraska
    Glaser Ceramics Inc. 2325 Kimarra Place Lincoln, Nebraska 68521 800-284-7299 info@glaserceramics.com https://glaserceramics.com/ Products Offered: Self-Supporting Cones Pyrometric Bars Small Cones
  • New Jersey
    Wholesale Craft Outlet LLC 900 Creek Road Bellmawr, NJ 08031 856-933-1504 https://ehobbycraft.com/ Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • New Mexico
    New Mexico Clay Co 3300 Girard Blvd NE Albuquerque, NM 87107 505-881-2350 sales@nmclay.com https://nmclay.com/ Products Offered: VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • New York
    Alpine Kilns & Equipment 65 Southern Lane Warwick, NY 10990-1275 845-987-9589 info@alpinekilns.com www.alpinekilns.com Products Offered: VentMaster Bailey Pottery Equipment PO Box 1577 Kingston, NY 12402-1577 845-339-3721 info@baileypottery.com www.baileypottery.com Products Offered: Self-Supporting Cones Large Cones Small Cones Pyrometric Bars VentMaster Controllers
  • North Carolina
    Carolina Clay Connection 208 N Polk Street Pineville, NC 28134 704-376-7221 carolinaclay@aol.com www.carolinaclay.com Products Offered: VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Highwater Clays 600 Riverside Drive Ashville, NC 28801 828-252-6033 sales@highwaterclays.com www.highwaterclays.com Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • Ohio
    Columbus Clay Company 1080 Chaambers Road Columbus, OH 43212 614-488-9600 info@columbusclay.com www.columbusclay.com Products Offered: VentMaster Kiln Vents Self-Supporting Cones Large Cones Small Cones Electric Studio 2181 Maplewood Road Cleveland Heights, OH 44118 216-932-3032 Products Offered: VentMaster Kiln Vents Laguna Clay Co. (Ohio) 61020 Leyshon Drive Byesville, OH 43723 740-439-4355 crystal@lagunaclay.com https://www.lagunaclay.com Products Offered: VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Mayco Colors 4077 Weaver Ct S Hilliard, OH 43026 614 876-1171 info@maycocolors.com www.mayco.com Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones National Artcraft Company 300 Campus Road Aurora, OH 44202 330-562-3500 sales@nationalartcraft.com www.nationalartcraft.com Products Offered: Self-Supporting Cones Large Cones Small Cones Vulcan Kilns 7623 Clyo Road Centerville, OH 45459 937 433-1833 vulcankilns@sbcglobal.net www.vulc ankilns.com Products Offered: AutoFire Kiln Controllers VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • Oregon
    Georgie's Ceramic & Clay 756 NE Lombard Portland, OR 97211 503-283-1353 portland@georgies.com www.georgies.com Products Offered: VentMaster Kiln Vents Self-Supporting cones Large Cones Pyrometric Bars Small Cones
  • Pennsylvania
    The Ceramic Shop 1200 Markley Street Norristown, PA 19401 610-994-1681 www.theceramicshop.com Products Offered: AutoFire Kiln Controllers VentMaster Kiln Vents Self-Supporting Cones Large Cones Small Cones Standard Ceramic 24 Chestnut Street Carnegie, PA 15106 412-276-6333 sales@standardceramic.com www.standardceramic.com Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • South Carolina
    Clay-King 310 Gossett Rd. Spartanburg, SC 29307 864-308-8027 info@clay-king.com www.clay-king.com Products Offered: VentMaster Kiln Vents Self-Supporting Cones Small Cones
  • Tennessee
    Mid South Ceramic Supply Co. 1416 Lebanon Pike Nashville, TN 37210 615 242-0300 info@midsouthceramics.com www.midsouthceramics.com Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars
  • Texas
    American Ceramic Supply 2442 Ludelle Street Fort Worth, TX 76105 866-535-2651 sales@americanceramics.com www.americanceramics.com Products Available: VentMaster Kiln Vents Self-Supporting Cones Pyrometric Bars Small Cones Armadillo Clay & Supplies 3307 East 4th Street Austin, TX 78702 512-385-7311 brent@armadillo.com www.armadilloclay.com Products Offered: VentMaster Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Ceramic Store Inc 1002 West 11th Street Houston, TX 77008 713 864-6442 ceramicstorehouston@yahoo.com https://store.ceramicstoreinc.com/ Products Offered: Self-Supporting Cones Large Cones Pyrometric Bars Paragon Industries 2011 S Town East Blvd. Mesquite, TX 75149 972 288-7557 orders@paragonweb.com www.paragonweb.com Products Offered: AutoFire Kiln Controllers VentMaster Kiln Vents Self-Supporting Cones Pyrometric Bars Small Cones Trinity Ceramic Supply 9016 Diplomacy Drive Dallas, TX 75219 214-631-0540 trinityceramic@gmail.com www.trinityceramic.com Products Offered: Self-Supporting Cones Large Cones Small Cones
  • Vermont
    Clayscapes Pottery Inc. 1003 W. Fayette St. Suite L1 Syracuse, NY 13204 315-424-6868 www.clayscapespottery.com Products: Large Cones Small Cones
  • Virginia
    The Kiln Doctor 501 East Main St. Front Royal, VA 22630 540-636-6016 info@thekilndoctor.com www.thekilndoctor.com Products Offered: AutoFire Kiln Controllers VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • Washington
    Clay Art Center Inc. 2636 Pioneer Way East Tacoma, WA 98404 253 922-5342 clayart@clayartcenter.net https://clayartcenter.net/ Products Offered: VentMaster Vent Self-Supporting Cones Large Cones Pyrometric Bars Small Cones Seattle Pottery Supply Inc. 35 South Hanford Street Seattle, WA 98134 206 587-0570 info@seattlepotterysupply.com https://seattlepotterysupply.com/ Products Offered: AutoFire Kiln Controllers VentMaster Kiln Vents Self-Supporting Cones Large Cones Pyrometric Bars Small Cones
  • Wisconsin
    NASCO 901 Janesville Avenue Fort Atkinson, WI 53538 800-558-9595 www.enasco.com Products Offered: VentMaster Kiln Vents Large Cones Pyrometric Bars Small Cones Paoli Clay Company, Inc. 6879 Paoli Road Belleville, WI 53508 608-845-7000 clayman@tds.net https://paoliclaycompany.com/ Products Offered: Large Cones Pyrometric Bars Small Cones

Firing Tips and Helpful Guides

Downloadable PDF Firing Tips
Avoiding Carbon Burnout Problems
Cones and Controllers
Cracking and Thermal Shock
Cracking and Warping Caused by Drying and Casting
Firing Ceramic Bodies
Firing Handbuilt or Thick Cast Ware
Firing Red Glazes
Glaze Defects - Blisters, Craters, and Pinholes
Improving Kiln Uniformity
Loading a Kiln for Best Results
Success with China Paints
Success with Decals
Success with Golds
Success with Lusters
Successful Glass Fusing
Understanding Crazing
Understanding Heat Transfer
Using the Three Cone System

Cone Chart - Celsius

Cone Chart - Fahrenheit

Temperature Equivalency - Celsius

Temperature Equivalency - Celsius

Cone Information

Safety Data Sheet

Our Pyrometric Cones have been tested rigourously over countless conditions, environments, and uses. This Safety Data Sheet is

Downloadable Full Cone Chart

The original and full-sized Orton cone chart. Hang it in on your shop wall for a quick reference.

Kiln Safety Manual

Proper set-up and maintenance of your kiln is critical to reliable and accurate clay firings. Understanding your kiln and its intricacies will all

Maintenance of a Kiln-Sitter

Kiln-sitters are a device for automatically shutting off your kiln when reaching a predetermined temperature or cone number.

Orton's Standardizing Process

It is important to realize that the Orton Foundation does not test cones under all of the many firing conditions where cones might be used successfully nor is it possible for the Foundation to know the critical nature of the firing control needed for all types of products. Changes in raw materials used in manufacturing of pyrometric cones may cause performance changes at firing rates or atmospheres different from Orton's standardizing conditions. Therefore the Orton Foundation encourages users with critical applications to check the performance of cones under their actual conditions of use. Each package of cones is identified with both cone and batch numbers so that the user may independently determine whether a new batch performs the same as the batch presently used before putting the new cones into service. By doing this, any changes in performance can be observed and recorded, thus maintaing product quality. If questions arise, please contact the Orton Foundation and one of our engineers will try to answer them