Raymond Jimison on sun 26 jun 11
I seem to have an issue with my Laguna white crackle glaze. It bubbles and =
=3D
crawls..=3DA0 At first I wasn't sure if I was over firing, under firing it,=
=3D
=3DA0applying to thick, etc.=3D0A=3DA0=3D0AI am using a pyrometer, and firi=
ng betwe=3D
en 1800-1835 F.=3DA0 When=3DA0the glaze=3DA0is too thin, besides the obviou=
s stre=3D
aks, it has small black spots and does not crackle.=3DA0 I determined this =
wa=3D
s from putting the pot into reduction too fast.=3D0A=3DA0=3D0AWhen the glaz=
e is a=3D
normal thickness, it will start to crawl and pull away from the pot.=3DA0 =
Th=3D
is glaze always breaks and curls when copper carb is added too it.=3D0A=3DA=
0=3D0A=3D
When to pot is pulled at a lower temperature, say 1700F,=3DA0 I get really =
go=3D
od crackle but still a little crawling though not as much.=3DA0 With copper=
c=3D
arb in it, at 1700 it still breaks away.=3D0A=3DA0=3D0AI think it is the gl=
aze it=3D
self, and not my technique.=3DA0 The reason I say this is I also have a Lag=
un=3D
a shinja that is absolutely beautiful.=3D0A=3DA0=3D0AThanks,=3D0ASandra=3D0=
Ajimisonpo=3D
ttery@yahoo.com=3D0A=3DA0=3D0AI know there are 1000 raku=3DA0 white cracke =
glazes o=3D
ut there, but before going and experimenting with different combos, I thoug=
=3D
ht I would just ask if my conclutions make sense.
paul gerhold on mon 27 jun 11
Explain exactly how you are applying the glaze to get it thick enough. Som=
e
application methods will exacerbate a glazes tendency to crawl. Are you
dipping, brushing multiple coats, prewetting the ware, etc.
On Sun, Jun 26, 2011 at 8:12 AM, Raymond Jimison
wrote:
> I seem to have an issue with my Laguna white crackle glaze. It bubbles an=
d
> crawls.. At first I wasn't sure if I was over firing, under firing it,
> applying to thick, etc.
>
> I am using a pyrometer, and firing between 1800-1835 F. When the glaze i=
s
> too thin, besides the obvious streaks, it has small black spots and does =
not
> crackle. I determined this was from putting the pot into reduction too
> fast.
>
> When the glaze is a normal thickness, it will start to crawl and pull awa=
y
> from the pot. This glaze always breaks and curls when copper carb is add=
ed
> too it.
>
> When to pot is pulled at a lower temperature, say 1700F, I get really go=
od
> crackle but still a little crawling though not as much. With copper carb=
in
> it, at 1700 it still breaks away.
>
> I think it is the glaze itself, and not my technique. The reason I say
> this is I also have a Laguna shinja that is absolutely beautiful.
>
> Thanks,
> Sandra
> jimisonpottery@yahoo.com
>
> I know there are 1000 raku white cracke glazes out there, but before goi=
ng
> and experimenting with different combos, I thought I would just ask if my
> conclutions make sense.
>
Steve Mills on mon 27 jun 11
U2VyaW91c2x5LCBmb3JnZXQgdGhlIFB5cm8sIGFuZCB3YXRjaCB0aGUgZ2xhemUuIFdoZW4gaXQ=
n
cyBzbW9vdGggKG5vIHNwb3RzKSBhbmQgbG9va3MgbGlrZSBHb2xkZW4gU3lydXAsIGl0J3MgZG9=
u
ZS4KSWYsIGFmdGVyIGZvbGxvd2luZyB0aGF0IHJvdXRpbmUgdGhlIGdsYXplIHN0aWxsIGxvb2t=
z
ICJ3cm9uZyIgd2hlbiBpdCdzIGNvb2xlZCwgdGhlbiB5b3UgbWF5IGhhdmUgY2F1c2UgdG8gY29=
t
cGxhaW4KClB5cm9tZXRlcnMgb25seSB0ZWxsIHlvdSB3aGF0IHRoZSBUZW1wZXJhdHVyZSBpcyB=
0
aGUgbWlsbGktc2Vjb25kIHlvdSBsb29rIGF0IGl0LCB0aGV5IERPTidUIG1lYXN1cmUgYWNjdW1=
1
bGF0ZWQgaGVhdC13b3JrIHdoaWNoIGlzIHdoYXQgbWVsdHMgZ2xhemVzIQoKU3RldmUgTQoKUmF=
5
bW9uZCBKaW1pc29uIDxqaW1pc29ucG90dGVyeUBZQUhPTy5DT00+IHdyb3RlOgoKPkkgc2VlbSB=
0
byBoYXZlIGFuIGlzc3VlIHdpdGggbXkgTGFndW5hIHdoaXRlIGNyYWNrbGUgZ2xhemUuIEl0IGJ=
1
YmJsZXMgYW5kIGNyYXdscy4uwqAgQXQgZmlyc3QgSSB3YXNuJ3Qgc3VyZSBpZiBJIHdhcyBvdmV=
y
IGZpcmluZywgdW5kZXIgZmlyaW5nIGl0LCDCoGFwcGx5aW5nIHRvIHRoaWNrLCBldGMuCj7CoAo=
+
SSBhbSB1c2luZyBhIHB5cm9tZXRlciwgYW5kIGZpcmluZyBiZXR3ZWVuIDE4MDAtMTgzNSBGLsK=
g
IFdoZW7CoHRoZSBnbGF6ZcKgaXMgdG9vIHRoaW4sIGJlc2lkZXMgdGhlIG9idmlvdXMgc3RyZWF=
r
cywgaXQgaGFzIHNtYWxsIGJsYWNrIHNwb3RzIGFuZCBkb2VzIG5vdCBjcmFja2xlLsKgIEkgZGV=
0
ZXJtaW5lZCB0aGlzIHdhcyBmcm9tIHB1dHRpbmcgdGhlIHBvdCBpbnRvIHJlZHVjdGlvbiB0b28=
g
ZmFzdC4KPsKgCj5XaGVuIHRoZSBnbGF6ZSBpcyBhIG5vcm1hbCB0aGlja25lc3MsIGl0IHdpbGw=
g
c3RhcnQgdG8gY3Jhd2wgYW5kIHB1bGwgYXdheSBmcm9tIHRoZSBwb3QuwqAgVGhpcyBnbGF6ZSB=
h
bHdheXMgYnJlYWtzIGFuZCBjdXJscyB3aGVuIGNvcHBlciBjYXJiIGlzIGFkZGVkIHRvbyBpdC4=
K
PsKgCj5XaGVuIHRvIHBvdCBpcyBwdWxsZWQgYXQgYSBsb3dlciB0ZW1wZXJhdHVyZSwgc2F5IDE=
3
MDBGLMKgIEkgZ2V0IHJlYWxseSBnb29kIGNyYWNrbGUgYnV0IHN0aWxsIGEgbGl0dGxlIGNyYXd=
s
aW5nIHRob3VnaCBub3QgYXMgbXVjaC7CoCBXaXRoIGNvcHBlciBjYXJiIGluIGl0LCBhdCAxNzA=
w
IGl0IHN0aWxsIGJyZWFrcyBhd2F5Lgo+wqAKPkkgdGhpbmsgaXQgaXMgdGhlIGdsYXplIGl0c2V=
s
ZiwgYW5kIG5vdCBteSB0ZWNobmlxdWUuwqAgVGhlIHJlYXNvbiBJIHNheSB0aGlzIGlzIEkgYWx=
z
byBoYXZlIGEgTGFndW5hIHNoaW5qYSB0aGF0IGlzIGFic29sdXRlbHkgYmVhdXRpZnVsLgo+wqA=
K
PlRoYW5rcywKPlNhbmRyYQo+amltaXNvbnBvdHRlcnlAeWFob28uY29tCj7CoAo+SSBrbm93IHR=
o
ZXJlIGFyZSAxMDAwIHJha3XCoCB3aGl0ZSBjcmFja2UgZ2xhemVzIG91dCB0aGVyZSwgYnV0IGJ=
l
Zm9yZSBnb2luZyBhbmQgZXhwZXJpbWVudGluZyB3aXRoIGRpZmZlcmVudCBjb21ib3MsIEkgdGh=
v
dWdodCBJIHdvdWxkIGp1c3QgYXNrIGlmIG15IGNvbmNsdXRpb25zIG1ha2Ugc2Vuc2UuCg=3D=
=3D
| |
|
