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Topic: New Sculpy Push Pins  (Read 4634 times)
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mean_green_machine
« Reply #10 on: March 24, 2006 02:42:48 PM »

those are so cute....you should sell them
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bluecat
« Reply #11 on: March 24, 2006 02:47:23 PM »

I love you Diane B. Your posts are always so helpful and your site rules.

About these thumbtacks, since there is no glue used, wouldn't they eventually weaken and crack because when you stick them in something (wall, cork board etc.) and them have to pull them out, Aren't you putting stress on the clay, not the glue (because you didn't use any)??

If the glue eventually gave out you could reglue it. But if the clay gives out then it would be much harder to fix and maybe not fixable. Or am I just overthinking this whole thing? hehe...
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lollipop is candy/garbage
« Reply #12 on: March 24, 2006 04:45:51 PM »

My sis and I have been making these pins for years now.
We prefer Sculpey over any other clay beacause of its simplicity and versatility.
They have never broken the key is to make them thick enough.
Glue often lets go.
Try it and see, after 5 years from the first one we made the clay is still holding strong after much use.
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klutzygirljenn
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Crazy Glue really does stick 2 your fingers!!


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« Reply #13 on: March 24, 2006 05:00:02 PM »

That bis so freaking awesome!!  I have scupley clay sitting here, you just gave me tons of ideas!!
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Diane B.
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GlassAttic --polymer clay "encyclopedia"


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« Reply #14 on: March 24, 2006 08:04:02 PM »

Quote
I love you Diane B. Your posts are always so helpful and your site rules.

Aw-w-w.... thanks  Grin

Quote
About these thumbtacks, since there is no glue used, wouldn't they eventually weaken and crack because when you stick them in something (wall, cork board etc.) and them have to pull them out, Aren't you putting stress on the clay, not the glue (because you didn't use any)??
If the glue eventually gave out you could reglue it. But if the clay gives out then it would be much harder to fix and maybe not fixable. Or am I just overthinking this whole thing? hehe...

You're not overthinking at all... those are the kinds of details that can cause heartbreak.  We run into them all the time in polymer clay.

So the deal in this case is.... if you made thumbtacks where the clay wrapped around the tack head, or all the way around even covering the back, creating a "mechanical hold," and then properly baked them, a strong clay would never "give out" from stress (...it could be abraided or cut though, if stressed by rough or sharp things over time, of course). 

That's not true for Sculpey though --and now FimoSoft as well-- unless any of the stressed areas of clay are fairly thick... then they'd probably be okay.  Those clays are just more "brittle" in thin areas though because of their formulations, and can snap or chip if stressed.  The stronger clays (Premo, FimoClassic, Kato, Cernit) would simply bend if stressed.... they're not "brittle" (you'll notice that even the surface of a strong clay and a weak one are different; one is harder, one is a bit "softer." 
(In fact, if you made a thin strip of a strong clay, baked it properly, and then tried to tear or break it, you probably couldn't do it.)

When any of the brands are thick though, they're stronger (still relative to total thickness and total stress though).  Plus, rounded, thick items like balls, etc., are such inherently strong shapes all by themselves that they're almost impossible to break even with a more brittle clay like Sculpey or the new version of FimoSoft.

This is not to say that you might not prefer to use a glue underneath the clay as well for even more strength, or to prevent wriggle if the clay isn't tight to the metal  --using a strong white glue, then letting it tack up before adding the clay can give a little tooth to the metal, so that's can maybe be good idea anyway... and/or using a bit of liquid clay even beside the white glue could give even more strength too.  But, those things aren't really necessary for strength.




Diane B.
GlassAttic ...polymer clay "encyclopedia"
http://glassattic.com/polymer/contents.htm

If you want an all-polymer clay board here at craftster, vote here!
http://www.craftster.org/forum/index.php?topic=72141.msg813624#msg813624





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POLYMER CLAY "ENCYCLOPEDIA" 
http://glassattic.com/polymer/contents.htm
few of my photos
http://s96.photobucket.com/albums/l163/DianeBB
(had to move them from YahooPhotos, so many now without captions)
lollipop is candy/garbage
« Reply #15 on: March 24, 2006 10:14:01 PM »

I suppose it's up to the users experience, but as I said before none of our pins have broken at the tack part.  So until I encounter a single problem like that I will use sculpey and also encourage others to use it as well.
Fimo is harder to work with, it crumbles and its more difficult to work with thats all
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Diane B.
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GlassAttic --polymer clay "encyclopedia"


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« Reply #16 on: March 26, 2006 03:46:19 PM »

Quote
I suppose it's up to the users experience, but as I said before none of our pins have broken at the tack part. 


Oh, I didn't mean to imply that all Sculpey-covered tacks would break.  For one thing,  your tacks are completely embedded, so those parts of the clay should be pretty strong since they have an armature underneath (...as long as the clay covering isn't really thin).
 
I would be suprised though if any of the parts without armatures, added to the tack head for example, didn't break in thin areas when stressed.  That's just the nature of those really soft clays (probably because of the amount of plasticizer required to make them that way).

Quote
. . . I will use sculpey and also encourage others to use it as well.  Fimo is harder to work with, it crumbles and its more difficult to work with thats all

True, especially if you don't buy FimoClassic "fresh" online, though Premo is one very good alternate choice because it's both strong after baking and softer than FimoClassic when raw.

Each to his own though!   I guess I've just seen too many heart-broken kids (and adults) who'd worked hard on a Sculpey item, only to see it break after awhile.  They never knew why, and never knew it could be avoided by using a stronger brand, so many of them just gave up on polymer clay in frustration.  Cry


Diane B.
--- polymer clay "encyclopedia"
http://www.glassattic.com/polymer/contents.htm
THIS ROCKS   Logged

POLYMER CLAY "ENCYCLOPEDIA" 
http://glassattic.com/polymer/contents.htm
few of my photos
http://s96.photobucket.com/albums/l163/DianeBB
(had to move them from YahooPhotos, so many now without captions)
lollipop is candy/garbage
« Reply #17 on: March 30, 2006 11:37:08 PM »

well no heartbreak here
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Laughter is the best medicine, unless you are diabetic in that case insulin is.
thetiniestspark
« Reply #18 on: March 31, 2006 11:41:23 AM »

Those are really cool!  I should make some South Park ones for my little brother.
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Ansleah
« Reply #19 on: March 31, 2006 03:30:44 PM »

Love the South Park ones!
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