Pawelpksa Posted September 10, 2018 Report Share Posted September 10, 2018 Hi, I'm looking for a tip how to achieve the following effect in glazing. See the picture of lava flow. It is black with grey patches and red lines. What you see in the photo is not ceramics but I need to emulate it on a ceramic. I have a razor with scales from this material and now need to make a box for shaving foam (quite similiar to a regular butter bell) and shaving scuttle. I thought about glazing white clay with glossy black glaze, waxing , then scrubbing the unregular lines and then adding red glaze. Does it make sense or there is better method? I also have problem with red glaze itself. I go for cone 6 and the red glazes that I use run and tend to change color. Can you recommend good one? thanks Link to comment Share on other sites More sharing options...
C.Banks Posted September 10, 2018 Report Share Posted September 10, 2018 This effect reminds me of layered clays. Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted September 10, 2018 Report Share Posted September 10, 2018 I agree that some kind of Nerikomi is going to be the best way to get those swirly yet distinct lines. I'd find a nice red clay rather than going for that much red stain however, for the sake of your own health and safety. Related-looking may be better than a total match. Link to comment Share on other sites More sharing options...
neilestrick Posted September 10, 2018 Report Share Posted September 10, 2018 You could probably get something close by doing a marbling technique with underglazes, and covering it with a nice thick clear glaze. Link to comment Share on other sites More sharing options...
liambesaw Posted September 11, 2018 Report Share Posted September 11, 2018 I'd probably go with a black outer and inner with a thin red rim just to keep things simple. The contrast in patterns may be interesting where the razor is the center of attention and the mug and brush are supportive Link to comment Share on other sites More sharing options...
Pawelpksa Posted September 11, 2018 Author Report Share Posted September 11, 2018 I made something like this in the picture by mixing porcelain with the same porcelain coloured with blue pigment and then throwing that on the wheel. I’m not sure if that is marbling or nerikomi technique (?). The effect is nice and would fit for the purpose if I do the same with black and red pigments. But….. Red pigment is an issue. I looked into 3 different local pottery suppliers and cannot find red pigment. They offer various colors but not red. There is red-brown or pink, but that all is far away from red (any similar to the red of the razor’s scales). Do you have any experience with red pigment which can be used in cone 6? I found some over-glaze paints with beautiful reds which get mature at 800C or 1050C but they require quick cycles (30 or 60 min) which is not achievable in home studio. The red rim would be an option, but all red glazes which I used in past (3-4) are kind of running glazes, so the rim is the worse place to apply them. Can you give suggestion for high temperature nice red not running glaze? I have not experience with underglazes at all One update. I have found red pigment. The issue is that it contains cadmium and Terra-Color does not say (unless I'm wrong) if after firing in 1250C with the porcelain or clay it becomes safe. Link to comment Share on other sites More sharing options...
liambesaw Posted September 11, 2018 Report Share Posted September 11, 2018 For a red like that I'd probably mix up my base glaze with zircopax and heavy on the Mason stain. Fire in oxidation if you can because I've noticed some of the Mason stains like deep crimson can turn green in reduction. Link to comment Share on other sites More sharing options...
Pawelpksa Posted September 12, 2018 Author Report Share Posted September 12, 2018 Mason stains are not available in Poland. Terra-Color provides some nice red pigments. Both formulas from mason and terra, as well as from others, contain cadmium. Terra declared they use inclusion pigment. So, I will try to do Agateware with porcelain colored with black and red pigments. Later, I can post results. I still need to read and learn how to handle cadmium based powders and wet clay in a safe way. Link to comment Share on other sites More sharing options...
yappystudent Posted September 13, 2018 Report Share Posted September 13, 2018 Another suggestion: if I were going for this look, I'd apply black underglaze with a brush, let dry then drag bright red underglaze over the surface using a finer brush, making sure the red 'strings' are applied as two coats at least in part. I'd do some tests so see how high I'd have to fire to get the underglazes to run together, if it's porcelain fired at cone 6 that should do it, but you could try a clear glaze over all. I've gotten some underglazes to run together really nicely as long as it's mid-fire temps. Link to comment Share on other sites More sharing options...
Pawelpksa Posted September 14, 2018 Author Report Share Posted September 14, 2018 Thanks, sounds nice. At the moment I try to do agateware with stains for the clay body. If done I will post results. Later I may try with underlazes but I'm bit afraid of my low paiting/brushing capabilites. Link to comment Share on other sites More sharing options...
Roberta12 Posted September 14, 2018 Report Share Posted September 14, 2018 I use a red underglaze from Amaco, Radient Red. Stays red to cone 6, oxidation. I believe the other manufacturers also have a nice red underglaze. Lovely work, by the way. Roberta Link to comment Share on other sites More sharing options...
Pawelpksa Posted September 17, 2018 Author Report Share Posted September 17, 2018 I made first attempt with red glazed rim and strips. Results can be seen in this video (turn off audio, but the starting picture shows the resul). Next will be stains (Terra-color) in clay body - agateware. Link to comment Share on other sites More sharing options...
Rae Reich Posted September 21, 2018 Report Share Posted September 21, 2018 Your striping looks just fine. I think the red match is perfect and the two stripes are just enough of a reference to the razor. If your agateware (that's what your throwing two colors together is called) experiments don't achieve the colors you want - which, I agree, would look very cool - I would go with this model. Is this a single order, or are you planning to make a larger quantity? Link to comment Share on other sites More sharing options...
Pawelpksa Posted September 21, 2018 Author Report Share Posted September 21, 2018 Thanks. I'm also surprised by the match in colors and quality of the red glaze. I expected troubles. At the moment I've received pigments and will experiment with agateware, probably later will need to glaze with transparent glossy. This is not an order, just fun. BTW, there is inner part of the box, also in black and red stripes. Link to comment Share on other sites More sharing options...
Pawelpksa Posted December 11, 2018 Author Report Share Posted December 11, 2018 here is another attempt with agateware, no glaze, porcelain Link to comment Share on other sites More sharing options...
Pawelpksa Posted December 21, 2018 Author Report Share Posted December 21, 2018 An here is a bit different approach with transparent glaze Link to comment Share on other sites More sharing options...
JohnnyK Posted December 21, 2018 Report Share Posted December 21, 2018 It looks like you are getting a handle on this, Pawelpksa. So what was your question? Link to comment Share on other sites More sharing options...
Bill Kielb Posted December 21, 2018 Report Share Posted December 21, 2018 That really looks like airbrush work to me. Painting the base red and black and airbrushing the highlights fairly easy task if one is inclined or experienced . I probably would end up adding some depth and highlight to the red but that is personal preference of course. At my age flames on custom cars and boats were common so we all learned how. Simple look for an airbrush artist using underglaze and then glaze firing the whole object with clear glaze. Link to comment Share on other sites More sharing options...
Pawelpksa Posted December 28, 2018 Author Report Share Posted December 28, 2018 thanks for all, I have not experience in airbrushing, might be challanging for me Link to comment Share on other sites More sharing options...
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