HOW TO PREVENT YOUR POLYMER CLAY PROJECT FROM BURNING IN THE TOASTER OVEN? You have seen the test on the toaster oven and the test result shows that the toaster oven is too hot for baking polymer clay. It will burnt your clay project and produce toxic fumes at that temperature. Well there is always a solution to every problem. Using the same toaster oven after it is cool for 45 min., I created a thermal shield with aluminium foil and a piece of 4"x4"x1/ 8"thk. white ceramic tile base.
Placing the oven thermometer inside the thermal shield as shown in the picture. Put the shield into the oven Set the toaster timer for 5 minute, notice the temperature will slowly rise to about 120ºC(248ºF). If you placed the PC beads or any other PC project, it will not burn the clay inside the shield.
Repeat the timer for another 5 or 10 min., when the timer almost near the 5min. run, you will notice the temperature rises to about 135ºC(275ºF).
Keep it running for 15min. max and another 15min. in this way, you can bake your completed PC beads or PC Project in the toaster oven.
For bigger toaster oven, you can built a thermal box out of ceramic tiles, the tiles that I am using is approx. 4"x4"x 1/ 8"thk.The 5 pcs. are bonded with 2 parts epoxy putty. When place the thermal box in the bigger toaster oven, preheat it for 15 min. NOTE: Solving the problem by shielding the PC project will prevent direct heating and the polymer clay will not be burnt. The temperature recorded with the oven thermometer shows, well within the recommended baking temperature.
Techniques/Lessons/Projects - Toaster Oven For Baking Polymer Clay
From: simgarie Nov-4
Have you ever wonder about the temperature
of the toaster over when baking polymer clay?
From: Ilene2004 Nov-4
Thanks for taking the time to post all that info!
From: simgarie Nov-5
From: Melody01 Nov-5
Hi Garie, Thanks so much for sharing
this info. Would you consider adding the Fahrenheit to Celsius
equivalents to make it more user friendly for those in the US?
Conversion table here:
From: simgarie Nov-5
Yes Anita, Thanks for your conversion
link and it is useful. I had already updated it with Fahrenheit
Hi Garie, Thanks! I grew up with Centigrade, but I just thought those who hadn't been might be a little confused. BTW, I got to spend a little more time at your site and want to spend a bit more . You have some great things there! I love the picture of readying the clay for 160 school children .Yikes! I bet they had a great time.
Thanks Anita, Polymer clay is a very popular art medium, created lots of fine artist around the world. I have been playing with PC for more than 20 years and been testing polymer clay for years, with toaster oven, convection oven, microwave oven and heat gun. I realised that there isn't enough information about baking with various appliances, there were always question about baking polymer clay in the forum. That is how I got started, there was a big debate about microwaving in PolymerClay Central, but, I still stick to my test and method and it is the safest. After all my Polymer clay beads and critters have lasted for more that a year and they are still in condition.
A convection type toaster oven would
be best. Or one that is well insulated to hold the heat better.
I have the Sculpey oven thermometer on sale for 1/2 price
then on the drop down menu click "I want to go shopping"
Hi Howard, I agreed with your comment
and its a good to buy a thermometer. Sometime convection oven
can have slight difference in temperature reading, that is why
you need to check and make sure its the right reading.
Hi Garie, Thanks for sharing all your
helpful research into curing poly clay. Wow, 20 years is a LONG
time. I have had your microwave info archived for quite a while
and you just reminded me that I have wanted to check it out........
Next vacation :-)
I think it is safe to say that
all ovens with have some variation is temperature. even
my kitchen oven spikes. Fortunately for me.. my Toaster
oven (an old Black and decker).. and super consistant
with its temperature. Some of my friends with newer
ones don't have that same luck.
Thanks Alicia, I am glad to help when
comes to testing polymer clay, conditioning and baking them.
Glad that they are helpful and informative.
You can also lay some ceramic tiles on the shelf. This will help keep the toaster oven hot, as the tiles will retain the heat alittle longer.
<<The Bottom line is test not only your oven several times, but also your thermometer, as they too can be inconsistant. I put 3 different therms in my oven and got 40 degrees of difference between them.>>
That's for sure!
After burning some clay using two different brands of the spring type thermometers in my convection oven, I did an experiment to compare the results of various thermometers. I first checked the calibration of two candy thermometers by putting them in boiling water (212 degrees F at sea level). One was right on, one low by 5 degrees.
Then I compared the temperature reading on the best candy thermometer with the two of the spring thermometers by placing them in the well preheated oven at the same time and moving them into identical positions to take oven hot spots into consideration. The spring types did not agree with either each other OR the candy thermometer. The brand new Sculpey brand was WAY off, reading 25 degrees too low (and got returned).
FYI: chart to calculate boiling point
I can't remember if the above site
is in Celsius or Fahrenheit. In case conversion is necessary:
AFTER my experiment, I read about thermometers at < www.glassattic.com > under "baking" and found reports from clayers that the springs in the spring type tend to wear out after 5-6 months of constant use.
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