Cool Tools Blog

Firing Guides & Information

Cyprus™ Copper Clay Firing Guide

Offered in lump (wet) form, this clay is waterbased, air dries and fires to .999 pure copper. Economical, easy to form, fire and finish, the fired clay presents as beautiful on its own or as the perfect platform for enameling projects.

FS999™ Fine Silver Clay Firing Guide

FS999 has a low shrinkage rate of 8-9% and can be kiln fired only.

EZ960® Sterling Silver Clay Firing Guide

No two part mixing and no carbon required. Sterling silver alloy with wonderful strength.

PMC Fine Silver Clay Firing Guide

Covers all the PMC Fine Silver clay products.

OneFire PMC STERLING Firing Guide

96% fine silver and 4% copper. No carbon required.

PMC STERLING Clay Firing Guide

.925 Sterling Silver alloy clay fires in carbon.

BRONZclay (Original) Firing Guide

Everything you need to know about firing BRONZclay by Metal Adventures.

FASTfire BRONZclay Firing Guide

So easy to fire! Get started with our complete instructions.

COPPRclay Firing Guide

Learn how to make slip, fire and finish this easy to use copper metal clay.

White COPPRclay Firing Guide

Learn how to make slip, fire and finish this easy to use copper metal clay.

Five Star Clay Firing Guide

All colors can be fired together with Five Star Clay!

Hadar's One-Fire Clay Firing Guide

Hadar’s Clay One-fire clays have a very long shelf life and nice consistency, are non-toxic, and do not contain allergenic ingredients such as nickel.

Goldie Clay Firing Guides

Goldie Clay includes a full line of base metal clays – Bronze, Iron, Brass and Copper. These clays all come in powder form with a very long shelf life.

Quick Reference Firing Schedule - Silver

Embedded Objects

Any object that can withstand the firing temperatures and times of silver metal clay can be embedded and fired in place. Some natural gemstones, lab gems and cubic zirconia can be used, as well as porcelain. Check out our Gemstone Firing Guide for details on a specific stone.

Firing Schedules

FS999™

Temperature

1650°F / 900°C
1600°F / 871°C
1650°F / 900°C
1450°F / 788°C
1400°F / 760°C

Hold Time

30 minutes – 2 hours (optimum)
1 hour
3 hours
4 hours
6 hours

EZ960®

1675°F / 913°C
1700°F / 927°C
1725°F / 941°C
2 hours (optimum, if bending post firing – 3 hours)
1 hour
15 minutes (additional firing recommended if used in a class situation)

PMC3

1650°F / 899°C
1560°F / 849°C
1290°F / 699°C
1200°F / 649°C
1110°F / 599°C
Torch – Red Glow
2 hours (optimum)
20 minutes
10 minutes
20 minutes
45 minutes
5 minutes (may vary depending on thickness)

PMC Flex

1650°F / 899°C
1290°F / 699/°C
1200°F / 649°C
1110°F / 599°C
2 hours (optimum)
10 minutes
20 minutes
45 minutes

PMC Plus

1650°F / 899°C
1560°F / 849°C
1470°F / 799°C
Torch – Red Glow
2 hours (optimum)
20 minutes
30 minutes
5 minutes (may vary depending on thickness)

Art Clay Silver

1650°F / 899°C
1600°F / 871°C
1560°F / 849°C
1472°F / 800°C
Torch – Red Glow
2 hours (optimum)
10 minutes
20 minutes
30 minutes
5 minutes (may vary depending on thickness)

Art Clay Silver 950

2 Stage:
1) 932°F / 500°C
2) 1598°F / 870°C
2 hours (optimum)
30 minutes (then increase temperature for stage 2)
1 hour (allow to cool in kiln)

Metal Magic Sterling

2 Stage:
1) Open Shelf: 1000°F / 538°C
2) Firing container with Activated Carbon: 1550°F / 843°C
2 hours (optimum)
30 minutes
2 hours