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Topic: Specific finishing glaze YOU use...  (Read 8678 times)
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extraespresso
« Reply #20 on: December 13, 2008 07:38:47 PM »

hmm..but did you use it before you baked it? I used it on an already baked and painted piece (the coil pot i just posted in the 'completed projects' board, in fact) and it went fine.
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Diane B.
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GlassAttic --polymer clay "encyclopedia"


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« Reply #21 on: December 15, 2008 07:22:38 AM »

Quote
I'm about to try simple clear nail varnish, I don't imagine it will waterproof my piece, but i'd like to give it a little shine. Has anyone tried it?

You can use clear nail polish on polymer clay... BUT it has to be the right type or it can create problems (immediately or up to six months later). 
If the polish is water-based/acrylic, then it's fine... but if it's not (sometimes called "enamel") then it shouldn't be used with polymer clay.  It can be really hard to tell which is which though since the type is not often stated on the bottle. 
The clear polishes intended for use on fake (acrylic) nails should be acrylics though, and there are some other okay-polishes listed on the Finishes page at my site linked to in my previous reply:
http://www.glassattic.com/polymer/finishes.htm
...for fingernail polishes, click on the sub-category Fingernail Polishes, which is under the category Other Acrylic/Water-Based Finishes

Non-water based finishes (and paints) will begin to dissolve baked clay at some point leaving it sticky or "melty" looking.
And if the surface is not clean of oils or if a finish is too thick, it can peel later (there can be other reasons for peeling as well ...for those, click on the Peeling category of the Finishes page above).

Clear acrylic finishes will be "waterproof" (though polymer clay is waterproof by itself).

Clear acrylic finishes also come in various degrees of shine, from none to quite glossy, so how much gloss you'll get depends on the particular one you choose.  (And in the case of Future in particular, when it's applied --while still warm from the oven, less glossy; when cool, quite glossy ... sanding and buffing will also improve glossiness though that's not done by most regular clayers).

Clear acrylic finishes can actually be applied to raw clay, but it's not often done for most situations.


HTH,

Diane B.
« Last Edit: December 15, 2008 07:32:14 AM by Diane B. » 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)
extraespresso
« Reply #22 on: December 15, 2008 11:45:47 AM »

actually, the clay i was using is salt dough, so i'm not sure of the effects. so far, the piece is holding up well, and i glazed something else with the same varnish and it turned out nicely.
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Diane B.
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GlassAttic --polymer clay "encyclopedia"


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« Reply #23 on: December 15, 2008 02:05:14 PM »

Quote
actually, the clay i was using is salt dough, so i'm not sure of the effects. so far, the piece is holding up well, and i glazed something else with the same varnish and it turned out nicely


Oh sorry, right... I forgot you were using salt dough clay. 

Salt dough is a type of air-dry clay so it can be finished with either water-based or non-water-based finishes without damage.  (And I guess there's no reason Future couldn't be used on it either...it's just thinner than other clear finishes so you might want to use 2 coats for maximum waterproofness.)

If a gloss finish of any kind (or even a permanent "white glue" thinned down with water, or a decoupage medium) is used on an air dry clay, the areas covered will be glossy when dry --or they'll be satin or matte if satin/semigloss or matte clear finishes are used.
Those areas will also then be reasonably waterproof (...air dry clays must be sealed though to make them waterproof, unlike polymer clays which are automatically waterproof).

There can be problems with clear finishes no matter what they're used on too just because of humidity and oils, etc....for example, each coat must dry completely before the next is added, oils can act as resists to finishes, and later humidity can be absorbed more easily by some finishes than others giving a cloudy effect.


HTH,

Diane B.
« Last Edit: December 15, 2008 02:55:47 PM by Diane B. » 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)
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