Specturn Pink Underglaze Turning White

[grumpykidstudio]

Hey guys!! Not sure what i did wrong here, my spectrum underglaze turnt white after firing!

A little info, I underglaze on Bisque and i fired at cone6 (for 12 hrs last night)

Thank you!!!!

[liambesaw]

Are you using a zinc free clear glaze on top?  

[grumpykidstudio]

24 minutes ago, liambesaw said:

Are you using a zinc free clear glaze on top?  

yes it is!

[liambesaw]

Might just not be thick enough underglaze then. I asked about zinc free glaze because zinc can interact with the chrome in a chrome-tin pink stain and cause it to bleach out or turn tan.

 

[grumpykidstudio]

Just now, liambesaw said:

Might just not be thick enough underglaze then. I asked about zinc free glaze because zinc can interact with the chrome in a chrome-tin pink stain and cause it to bleach out or turn tan.

 

Ohh  I see! I will need to do some experimenting then haha thank u!

 

[neilestrick]

Have you used this pink successfully before? Is your clear glossy or more satin? It looks a bit satin in the photo, which could contribute to the color not coming through as well as expected.

[Min]

Which Spectrum pink underglaze and what glaze did you use? 

[Roberta12]

I talked to the Duncan and Amaco people about the pink and rose colored UG.  It just fades at cone 6.  Doesn't seem to matter which clear is over it.  They said it is a problem at cone 6.   I have found if I mix red and white, I get a pink  that stays bright.

Roberta

[grumpykidstudio]

21 minutes ago, Roberta12 said:

I talked to the Duncan and Amaco people about the pink and rose colored UG.  It just fades at cone 6.  Doesn't seem to matter which clear is over it.  They said it is a problem at cone 6.   I have found if I mix red and white, I get a pink  that stays bright.

Roberta

Thank u! I will try tht

[Min]

Spectrum 570 Hot Pink uses a cadmium inclusion stain, it remained true to colour at cone 6 when I used it. It did flux enough at cone 04 bisque to form a sheen but is fine at a 06 bisque.  I believe Speedball pink uses cadmium inclusion stain also, plus it's a fair bit less expensive than Spectrum.

[grumpykidstudio]

18 minutes ago, Min said:

Spectrum 570 Hot Pink uses a cadmium inclusion stain, it remained true to colour at cone 6 when I used it. It did flux enough at cone 04 bisque to form a sheen but is fine at a 06 bisque.  I believe Speedball pink uses cadmium inclusion stain also, plus it's a fair bit less expensive than Spectrum.

Thank U!!

[Roberta12]

3 hours ago, Min said:

Spectrum 570 Hot Pink uses a cadmium inclusion stain, it remained true to colour at cone 6 when I used it. It did flux enough at cone 04 bisque to form a sheen but is fine at a 06 bisque.  I believe Speedball pink uses cadmium inclusion stain also, plus it's a fair bit less expensive than Spectrum.

Good to know!!

 

[oldlady]

grumpy, if you look at a question in this section of the forum titled  slip/engobe as decoration.  i included a photo of slips in various colors including several pinks.  might work for you.

if you make your own glazes, i have one that works in pink as well.   will try to add a photo here but that is hard.

[neilestrick]

Speedball pink underglaze holds up well at cone 6. It's a little bit salmon-colored out of the jar, so I cut it 50/50 with their white:

 

[liambesaw]

Oo dang that looks good.  It's a little orangy but I think a pink pink would look a bit ridiculous

[neilestrick]

11 hours ago, liambesaw said:

Oo dang that looks good.  It's a little orangy but I think a pink pink would look a bit ridiculous

Thanks! It's less orangy in real life.

[Morgan]

That’s great @neilestrick. What do you use for your line work? Is that just black underglaze in an applicator ?

[neilestrick]

8 hours ago, Morgan said:

That’s great @neilestrick. What do you use for your line work? Is that just black underglaze in an applicator ?

Thanks! It's a technique known as mishima. At the leather hard stage, underglaze colors first, cover the piece in wax, cut the lines with a needle tool, fill in the line with black underglaze, clean off the surface (wax protects the colors).

https://www.youtube.com/watch?v=Olj6yxjPU54&feature=youtu.be

[Morgan]

13 hours ago, neilestrick said:

Thanks! It's a technique known as mishima. At the leather hard stage, underglaze colors first, cover the piece in wax, cut the lines with a needle tool, fill in the line with black underglaze, clean off the surface (wax protects the colors).

https://www.youtube.com/watch?v=Olj6yxjPU54&feature=youtu.be

Awesome, looks fabulous!