Testing Kato polymer clay to the recommended temperature.

In my previous test to all types of clay, I've already increased the baking temperature to plus ten degree Celsius more that the manufacturer recommended temperature for many types of polymer clay such as Sculpey 130º C, Cernit, 130º C, Filani 130º C, Pardo 130º C and as for Fimo from 110º C to 140º C.Since, Kato Clay is not commonly used in Singapore, the recommended baking temperature is 150º C, I had a request from Gillian Wiseman, after posting my test in (clay-Polymer)

"Garie,

It would be nice if you would also test Kato clay at the recommended baking temperature, rather than at the standard temp for the rest of the clays, which means it is undercured in your tests.

Gillian"


Here is the test on Kato baking at the temperature 150ºC, thickness is 6mm in diameter.

To achieve a constant temperature
of 150º C, I rely on my oven
thermometer and baked the
clay for 30 minutes

The baked clay is silky smooth like plastic.

Comparing unbaked to the baked Kato at
150ºC the color changed slightly at
140º C and at 150ºC the clay is darker.

Bending the 6 mm thick, Kato clay is
 harder to bend than Fimo, Sculpey,
Filani and Pardo.

The clay can be bend as compared
the 140º C which is brittle and break
Temperature, its is a tough clay to
bend, after about 7 times bending,
 there's some cracks on the surface
of the baked clay.

Gillian is right, that it is 'undercured'
which will mean changed to darker
color.
Basically, if you are going to make
the clay tough it should be 150ºC,
but if you are going to combine Kato
and other types of polymer clay then
the safest will be 140º C to avoid
color changes, as higher
temperature will also affect other
brands of polymer clay.

I am happy that she commented on
the post, which prompted me to
further the test on Kato Polymer
Clay

" Thanks, Garie; you do such a good job with your tests. 
It really is important info that we all need to know.

Gillian"
October 8, 2013 PM 09:45:47 GMT+08:00

Testing Polymer Clay Flexibility At 12 mm Thickness In Diameter

Test samples selected subjected to further flexibility test at 12mm thickness in diameter, after baking for 40 minutes at the temperature of 140º C, these are the flexible clay, Fimo Classic, Fimo Soft, Premo, Filani and Pardo.

The clay that are flexible after the two test,
2.0mm thickness and 6.0mm thickness

12mm test samples prepared to be baked
in the oven at a temperature of 140º C for
40 minutes

Baked test sample after 40 minutes

Various test samples rigid and hard

Using my fingers to compress does
not bend or flex the 12mm thick clay

Using both hands, I am able to bend the
12mm thick Fimo Classic clay

Using my fingers to compress does
not bend or flex the 12mm thick clay

Using both hands, I am able to bend the
12mm thick Fimo Soft clay

Using my fingers to compress does
not bend or flex the 12mm thick clay

Using both hands, I am able to bend the
12mm thick Premo clay

Using my fingers to compress I can

 flexed the 12mm thick clay

Using both hands, I am able to bend the

12mm thick Filani clay

Using my fingers to compress does

not bend or flex the 12mm thick clay

Using both hands, I am able to bend the

12mm thick Pardo clay, that does not
shows any cracks unlike the previous
two tests, both on 2.0mm and 6.0mm


Conclusion:
The final result with regards to the most flexible polymer clay is Filani 
even at 12 mm thickness.

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Testing Polymer Clay Flexibility at 6.0 mm Thickness

Test samples are Fimo Classic, Fimo Soft, Premo,Sculpey III, Bake Shop Cernit, Filani, Kato and Pardo polymer clay, at 6.0 mm thickness. Test samples are baked at 140º C for 30 minutes.

Test sample at 6.0mm thickness in diameter,
bakedat 140ºC for 30 minutes

Fimo Classic is flexible

Fimo Soft is flexible

Premo is flexible

Sculpey III is brittle

BakeShop is brittle

Cernit is hard and brittle

Filani very flexible

Kato is hard and brittle

Pardo is flexible bur cracks after a
few bending

The result shows that the Fimo Classic, 
Fimo Soft, Premo are flexible even at
 6.0mm diameter or thickness. The best 
 Filani clay very flexible and strong almost 
like rubber. 
As for the rest Sculpey III and Bakeshop

both clay are brittle, break easily. The 
other clay that I have yet to mention, 
Cernit and Kato, are hard and brittle. 
Lastly, Pardo is flexible but weak, after 
a few bending the baked clay already 
shows cracks on the surface.

Flexibility Test On All Polymer Clay

Testing for flexibility on Fimo Classic, Fimo Soft, Premo, Sculpey III, Bakshop, Cernit, Filani,Kato And Pardo polymer clay at 2.0mm thickness baking at 140ºC for 30 minutes.

Test samples prepared for baking at
2.0mm thickness

Test samples from original clay packing

Fimo Classic flexible

Fimo Soft flexible

Premo Sculpey flexible

Sculpey III weak brittle

BakeShop is brittle

Cernit is hard but brittle

Filani is very flexible

Kato very hard but brittle

Pardo is flexible but cracked after a
few bending

Test shows that Sculpey III, Bakeshop, 
Cernit and Kato are brittle. As for Pardo 
it cracked after a few bending. At 2.0mm
Filani is the most flexible beside 
Fimo Classic, Premo and Fimo Soft.

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