Additions of stains and oxides can be done to personal taste. And of course the amount of commercial stain to produce the rich colors similar to commercial underglazes was ultimately very expensive. You can buy soft rubber-like slabs for this purpose that are easy to cut. SKU 537/4 Categories Spectrum Underglazes, Underglazes $ 8.00. This is limited edition only available in spring and summer season. With a powerful colourant like cobalt, this can be a big change. I mix the cobalt oxide with gerstley borate, which also typically eliminates the need for adding the PVA (Elmers white) glue. Most underglaze transfers can be applied to greenware or bisqueware. At low levels, it is beneficial to human health and is a component of vitamin . The marks made on pottery with a normal graphite pencil burn off during firing. If you are working with multiple colors, make sure that your brush is clean when switching between colors. This unit is used in unity molecular formulas for glazes. You can cut away the background around your design. If you mix these color concentrates with clear or white glaze in a ratio of 1 to 3, or 1 to 7, you'll quickly see that blues and greens have greater tinting power than than red and yellows. Usually, several layers are used to make the color opaque enough. Most underglaze can be applied to clay at any greenware stage. They can be applied with a variety of tools including brushes, spray guns, sponges, or really any way you can think to get them to stick. I've tried researching it a little and can't seem to find anything on the internet about it or how to do it. Some ceramicists screenprint underglaze onto slabs of wet clay. The amount of titanium oxide used, either as rutile or titanium dioxide, influences the green color. Handcrafted Teacup: pair 180ml (6.09fl oz) each, diameter: 2.95inches (7.5cm), height: 3.54inches (9cm) Sophisticated Kyo Yaki (Kyoto Style) Made by Ichiraku Yamamoto at Ichiraku Kiln. Want to be added to our monthly newsletter which details each month's clay club meeting? So, no gerstley, clay, or gylcerin? Cobalt Carbonate. This is a good way to get quite a precise result. Once the underglaze has been transferred, carefully peel the paper off the pottery. If it dries out whilst you are working, you can mist it with water to keep it damp. The ideal mixture is one portion local cobalt (ie 10 % in the mixture is local cobalt). Today sunflower captures the same authentic Spode blue that was born from the original process of under-glaze printing from hand-engraved copper plates. I generally brush my glazes, since I don't have the equipment for spraying or the large buckets of glaze for dipping (small operation, here!) I don't have any as I fire cone 9/10 glazes so never needed any frits. allowed for full incorporation of the color with the other two ingredients during the mixing of the base recipe. If you dont let them dry then when you apply the next coat you will lift off the first. Mixed one part tint bottle with 3 to 7 parts clear or white glaze results in a translucent color. The most important ingredient in the glaze is silica, and the variations in type depend on the addition of other materials.' These additions include copper, aluminium and other ingredients that can affect the glaze's viscosity, colour and texture. Metallic glaze test tile, cone 6. and without flaws. Place your lino up against your pottery. In this post, an excerpt from the Technofile department in Ceramics Monthly, Dave Finkelnburg discusses the many possibilities that are possible with this multifaceted little colorant. A good idea is to buy a slab of sponge that might be used to line a chair. Line cutting is a very simple way to add graphic-looking images and textures to your pottery. Lino cutters come with various size blades. This blog is a chronicle of what I have learned as I got back into the potter's saddle! Silk screening and screen printing refer to the same process. I use them for everything except black, where I use the LUG. Call (225) 687-7590 or what can i bring on a cruise royal caribbean today! Do you paint it on bisqueware and fire separately before glazing over top? Or you can cut away the lines of the design so that your image is a negative on your block. Underglaze can be dipped so that it is only applied to the outside of a vessel. Or sponge it a little. A small addition of a lower melting frit will tend to "set" the bisque fired material a bit. It does help a lot to have a couple of years of chemistry and science classes. "22% gerstley borate, mixed and sieved. Make the paper stencil damp so it sticks to the underglaze. I actually mixed three batches of each recipe to testing gums and suspenders, without which, any substance mixed from the above ingredients would settle to a Can you paint unfired clay with the cobalt-water mixture before you bisque it? However, I'm a little confused about your metrics. Applying the underglaze decal involves wrapping it around your pottery and wetting the transfer paper. You could add some food coloring so you can see what you are doing. This will of course leave an underglaze impression on your pottery of your shape. You can experiment with the look of the pattern by watering the underglaze down. They take light-colored, transparent or If you want to build up color, you will need to apply several layers. You can buy a palette of watercolor underglaze. beyond iterations of slips (clay suspended in water, formulated to fit either to wet or dry greenware) and engobes (generally a lower clay content, most often fits greenware and bisqueware ). There is a number of different ways you can use a silkscreen to apply underglaze. Chemical Analysis Na2O 0.07 Al2O3 0.12 SiO2 1.12 K2O 0.05 B2O3 0.09 TiO2 0.00 MgO 0.67 Fe2O3 0.00 CaO 0.21 Alumina:Silica ratio is 1.00 : 9.09 Neutral:Acid ratio is 1.00 : 5.19 Alkali:Neutral:Acid ratio is 1.00 : 0.22 : 1.12 . The Construction and temperature ranges are also different. So, your underglaze will sit neatly between the lines of your design. I've tried 2 different shades of Amaco's LUG series, but don't like the consistency, or visibility. This colorant is actually quite versatile and can make glazes that run the gamut from green to purple, pink to blue violet, blues mottled with red, pink, and even an intense black. Of course you are not going to. It is important to let the layers dry between coats. Therefore, it tends to flatten out on surfaces that its applied to. However, two or more colorants in a glaze interact so that the wavelengths of light absorbed are different for the combination than for either colorant by itself. There is a particular sgraffito style of pattern, which often looks Aztec to me. Underglaze pens, pencils, and crayons allow you to draw precise lines on your pottery. Books Garth Clark: Geert Laps Book is a Visual Feast but Intellectually Confused. Incorporate Sta Flo Laundry Starch until the mixture reaches a thin yogurt consistency and sieve the entire mixture again. It is a way of carrying the underglaze design. I have some, if you'd like to do some tests. cobalt underglaze recipe. Even when very sharp tools are used to scrape excess you can lose some detail in the design. Put a small amount of water into a cup, around 3 tablespoons is sufficient. I'm going to post some C & H wisdom. Everyone at our studio much prefers this mix to under-glazes as they never blister or change color. If you have scooped the line of the design away, your image will be indented into the lino. From about 1745, the porcelain manufactory at Vincennes (established in 1740 on the grounds of a former hunting lodge, east of Paris) marked its wares with the royal cipher - two interlaced L's. This is usually painted in cobalt blue, either in overglaze enamel or in underglaze pigment. brian kim, cpa clearvalue tax net worth . If other oxides are used, a good starting point is 4% iron, 2% cobalt, 2% manganese dioxide, and 2% copper oxide. These characteristics were my goal when learning how to make underglaze. On darker clays, or where it is thicker, it will turn a lighter, more cloudy blue that is still really nice. This gives you access to all sides without touching the surface of your ware. Plus, I will compare the materials used, the firing process, and the end results with how these distinctions affect ceramic artists' work. If you can think of a use for it you can also make a cobalt tape which is flexible and can be cut with scissors or hole punches then applied. Basically, you push the lino cutter along the surface of the lino block. Clay Club aims to connect potters and ceramic artists of our community. Slip is a liquid mixture of clay and water used for forming ceramic pieces and as a base for glaze. Westerville, OH 43082, Annual National K-12 Ceramic Exhibition Award, ICAN Making a Difference in Ceramics Award, Workhouse Clay International ICAN Merit Award, Ceramics Monthly's Print Mailing Schedule, Pottery Making Illustrated's Print Mailing Schedule, Pottery Making Illustrated Submission Guidelines. After the clay is bisque fired they inlay underglaze into the carved lines. Oxides result when an element combines with oxygen. I started by choosing a clay and a flux. Do you dip, brush, or spray your glazes? You can find all our products available to buy online, as well as in our three branches. hot water and let sit for. Other types of underglaze pens work a little bit like a slip trailing bulb. When working on lighter areas of your painting, use fewer layers. This is fine if you are trying to achieve a watercolor effect. The total of all the colorant oxides need not be more than 10 or 11%. In a glaze firing the oxygen usually comes from air, though in a fuel-fired kiln it may also come from carbon monoxide and carbon dioxide. If you use a roller, its likely that you will get specks and blobs of underglaze elsewhere. Potters will often draw or trace their design onto the surface of the underglaze. And there is great scope for creativity. Apr 8, 2020 - Cone 6 glaze recipes. It is best to use underglaze pencils on bisque fired pottery. Pour in the gerstley borate mixture leaving 1" at the top of each bottle then shake thoroughly. You can do this by tapping the side of the container and giving it a gentle shimmy. 5 days ago ceramicartsnetwork.org Show details . This is a simple piece of equipment that looks a little like a tobacco pipe. Method 1 Making a Glaze with Turpentine and Stand Oil Download Article 1 Buy linseed stand oil and turpentine from an art store. Peel the sponge away carefully to reveal the pattern underneath. Let the underglaze sit for a moment so that any bubbles can rise to the surface. The zircopax essentially gives us a white canvas to pain the bright colors on, rather than making red into a pink. I tested CMC gum (powder, premixed into a liquid), premixed bentonite, and Sta Flo laundry starch (a tip from one of the internet recipes). The underglaze is put in a little bowl on top of the pipe. Leather hard clay offers more resistance and will provide a cleaner finish. In each separate petal, a branch of flower is depicted. These range from dipping and painting, to carving and marbling. Either a table or if you want to keep things tidy, you can spray it into a tray. Also, you can vary the width of the mark by changing how close you are to your work. The reason for this is that soft clay tends to distort when you are carving through the underglaze. This will create a textured pattern of your design. The black areas of the photocopied image will resist the underglaze. This is a novel but very simple way of creating a wonderful marbling effect with underglaze. You may also want to add some Mn or Fe to soften it a bit. Because underglaze has a high clay content, it can be burnished to a high smooth polish. Then using a sharp knife or scalpel, you can cut and sculpt your foam into whatever shape you like. Emit only one wavelength and you have that color, just like taking a little slice out of a rainbow. As such, you can roller underglaze onto the design. Before carving, it is a good idea to draw your design on the block first and follow the lines. However, here is one way to use lino as a method of applying underglaze. One example is the Soft-Kut Printing Block. Then you can press the lino onto your pottery surface to transfer the underglaze. You seem like an endless wealth of technical information. Because a significant amount of alumina can be dissolved from the clay body by the glaze during firing, glaze thickness can cause the same glaze to turn blue (where thick) and green (where thin) on the same piece. However, some potters claim that the scraping process can blur the scored edges. **First published in 2014 Here are 16 of the best and most versatile ways of using underglaze on your pottery and ceramics. Try it with Cobalt Blue under or over. There are innumerable underglaze techniques. Variations of underglaze recipes were available on the Internet but not much could be found in textbooks, Its possible to buy very fine metal nozzles for a slip trailer. And you can add some Elmers Glue-all (white carpenter's wood glue) to the liquid mixture to stop the dried painting medium from smudging so easily. Not sure what that is as I use it in some recipes for suspension but after some research into oxide washes/underglazes it seems to be used in them. This is an affiliate advertising program designed to provide a means for the site to earn advertising fees by advertising and linking to Amazon.com. Then in a radical move, I ignored all previous instruction and treated the colorant as one of the base ingredients. Underglaze or colored slip can be painted into the incised lines. Smooth, silky, perfectly opaque, commercial underglaze is that wonderful substance that coats and colors both greenware and bisque ware with ease (Ive even seen it work on mature cone 04 earthenware), It works on bisque as well as on greenware - use a bit thinner on bisque than on greenware.Can add more Co to get darker - depends on the thickness of application and on your covering glaze. Cobalt in a fired glaze usually absorbs all wavelengths of visible light except blue and this is why a cobalt blue glaze is blue. Some will brighten up and get a bit darker when they have been fired. hobby magazine That's the amazing thing about ceramics. I have been doing some more research and have read about mixing up a slip with a little cobalt carbonate in it, and then painting that on (I would assume) leather-hard clay before bisquing. Remember that you will need to apply at least three coats for opacity. This can be drawn freehand or traced. Laundry starch? 3 days ago ceramicartsnetwork.org Show details . In with Norm. As are the tools that potters use to incise the clay. I hold the kiln at 1000F for 30 minutes. Like other decorating techniques, it can be a good idea to apply white underglaze before you paint your design. Cobalt was used under the glaze to paint the outlines and areas of blue wash needed in the design. The air in the vessel will stop the underglaze from going onto the inside surface. 2000. This looks good over a black slip or over some velvet underglazes. You can build on this technique as follows. One suggested way of using underglaze crayons is to apply a glaze to your piece first. Some raw materials are used in oxide form (like black cobalt oxide) while others form oxides during the firing process. Pottery Crafts. Let the layers dry between painting. It is very simple to make your own transfers. The Pottery Wheel is a participant in the Amazon Services LLC Associates Program. MUSEUM LOCATION This item is on view in Asian Galleries, West, 2nd floor (China) CAPTION Wine Jar with Fish and Aquatic Plants, 14th century. Potters refer to this as inlaying the underglaze or slip. Jon is ceramics "tech weenie" to beat all tech weenies. In addition to this, the way you fire something will affect how your pottery turns out. Take a look here for some tips on preventing underglaze smudging and bleeding. Web Low Fire Glaze Recipes Ceramic Supplies Ceramic Colorants Ceramic Glazes and Underglazes Ceramic Raw Materials Pottery Clay Clay Tools and Equipment Ceramic 319 Show detail Preview View more Clay Club meets at artist studios and other locations throughout Western North Carolina, usually on the second Wednesday of the month. to create colloids. Unlike underglaze pencils they allow you to blend your colors in more. Then using a sponge (or a brush if you prefer), dab underglaze onto the cut-out shape. There are some simple steps you can take to prevent this from happening. We therefore, fire all of our work and our students work to cone 6 including underglazes. Glazes high in iron black tend to fade brown and glazes with high amounts of cobalt tend to fade blue over a white glazes. Let me look Kawai BlueFine red clay (I use Redart) 75Amakusa (I use Cornwall Stone) 25Cobalt Oxide 1.2RIO 1.7Apply thin for bisque under a clear glaze. Try the cobalt and frit in equal amounts, then add water to find the consistency and color you want. These are thin-walled 5 inch cast bowls, each holds about one kg. Slip and underglaze are both materials used in ceramics, but serve different purposes. When the bulb is squeezed the slip comes out in a trail. And dry your brush between different coats too. Because slip can be relatively thick, it creates raised lines on the ware. Not Underglaze is an incredibly versatile way of decorating clay. Cobalt Blue is a dependable Cone 5-6 mid-range oxidation glaze with a deep blue glossy finish breaking to lighter blue highlights. Once you have covered the area you want marbling with foam and underglaze carry it to the sink. I am also aware of potters that score the greenware and then fire it. Cauleen Smiths Universe, Give It or Leave It, Honorable Mention Essay, 2018 New Art Writers Contest! One suggestion is to apply the first layer of clear glaze very lightly, with a feathered brush. Spraying the underglaze on through a stencil can create interesting patterns and effects. Underglaze does not melt and stick to the kiln in the same way that glaze does. 2009 chevy silverado center console lid replacement; tess gerritsen net worth However, more recently, I found myself being drawn back to pottery and the potter's wheel. Bear in mind that you will need your fingers or dipping tongs to fit in there too. This will leave you with a design that stands out as a positive image from your lino. Just want it to fuse with the pot once bisque. glazes cone 6. Underglaze copper red decoration was very rare. As you push, it will scoop out lines in the rubber. Look up Jon Singer. Gerstley borate provides needed flux and suspension in water which gives people an easy way to portion out color. Then using a roller or your thumb press the lino onto the clay surface. Have any questions? Hi - I use this slip - 50% spar 50% ball clay and then 2.5% Co and .5% iron oxide. Ceramic Arts Network Total. Oxide: A chemical compound containing at least one oxygen atom as well as at least one other element. The truth is, I was a nerdy ceramics undergraduate student. This will burst the bubbles in the bucket that are sitting against the bisque ware. It creates a permanent color that can't be changed after glazing and firing. The starch makes the underglaze stiffer. Used alone with brushing media the cobalt seems more prone to bleeding. One idea is to soak up the underglaze in the sponge and dab it onto the pottery. To this we add 11.1% mason stain plus 5.6% zircopax for colors other than blacks or greys. The mold could be skimmed off but added unwanted lumps if it wasnt all removed. And check that any air bubbles dragged into the underglaze when mixing have been released. One tool that is helpful for applying underglaze is to use a banding wheel. By itself this color concentrate is slightly more fluxed than under-glaze at ^06 and not quite as fluxed as most glazes at ^6. They work by dispensing underglaze onto your ceramics when you press down on the nib. Airbrushes are great for creating color gradients. Turpentine and linseed stand oil may be used for a standard oil glaze. Iron is not required to make a black glaze, but as an alternative, it is inexpensive, readily available, and non-toxic. Then the underglaze that you apply for decoration is then less likely to flake off. Less rutile also helps avoid pinholes in the glaze. These glazes are typically flux saturated and the matteness comes from precipitating crystals of the flux in combination with aluminum and silicon. Here is a step-by-step video on how to use underglaze transfers. And the edges of the incised lines can lose their definition. And as you are working, you can switch bottles quickly and blend colors easily. The Mishima technique involves scoring into greenware using a sharp tool. Then they mold the slab of clay around a shape that they want to recreate. Here's an example of trying to get 0.2% cobalt into a 100g batch vs a 4000g batch. It can be helpful to thin some underglaze down with water and apply this first to act as a primer. I actually have some alberta. They are a great way to add fine detail to your design if you enjoy drawing. It has a nozzle or nib attached. And apply 3 or 4 layers rather than just a couple. It means that using this engobeis much, much cleaner than using a body or slip colored using raw or burnt umber, iron, manganese or cobalt. Im Lesley, the creator of The Pottery Wheel. Nice over texture, slips, underglazes and other glazes. So, you dont have to press excessively hard. Then using a brush or sponge, apply another color of glaze to the clay surrounding the stencil. how long can a dog live with parathyroid disease. Underglaze pens are good for fine detail work. Traditional Cobalt Decorated Tiles from Delft. We exchange ideas, share information and form friendships. As a result, the image is printed onto the pottery. So I set out on a quest to figure out how to make underglaze. Avoid Melting Problems, Choosing a Pottery Glaze A Beginners Guide to Ceramic Glazes. This comment has been removed by the author. If I apply the cobalt (either mixed with frit and water or mixed into a slip) to greenware and then fire, will it still cause bleeding? It is quite time-consuming. cobalt underglaze recipe. Sieve all materials with an 80 mesh sieve and then ball mill for at least 12 hours. It is easy to make and use paper stencils to apply underglaze. If you can find some:Albany 90RIO 10Cobalt Carb. Typical cobalt levels are between 1 and 3% and iron levels up to 9%. It can then be transferred onto your ceramic work in a few different ways. However! The ancient landscape is drawn in blue glaze on the outside of this cup. You will find that an amazing marbled underglaze effect has adhered to the bisque pottery. You need to rub the whole piece of pottery until it is a bit darker and has a soft sheen. 1/4 cobalt carbonate 1/2 copper carbonate ----- 10 parts Iridescent, matt, luster effects. Make sure your underglaze is mixed. Then drip your underglaze onto the shaving foam. I tested each glaze on leather-hard, bone-dry, and bisqued earthenware and stoneware test tiles. Some General Tips About Underglaze Techniques: Badger Model 150 Airbrush Set View on Blick, Underglaze does not melt and stick to the kiln, Speedball Screen Printing Frame View on Blick, Amaco Underglaze Chalk Crayons View on Blic. The lack of sieving and ball milling did the same. Like always you'll have to test to find the blend that works with your clay, glaze, and style of brushwork. The hardness of an underglaze pencil is similar to a graphite HB pencil. Description. The idea is that the underlying clay is exposed by the lines made on the surface. Mixing Liquid Starch Into Your Underglaze Yet another solution 1 is to mix liquid starch like Sta-Flo directly in with the underglaze. The pattern of the slip will also show through the sanded underglaze. Not too much to ask, right? how many remington model six were made cobalt underglaze recipe Applying three layers of white underglaze will give you an opaque canvas to paint on. Any painter will tell you that bristles coming off brushes and sticking to their work happens frequently. Mottled Blue - Single dip (2-3 coats brushed) Fairly stable, no running, some breaking. I used commercial stains in order to get an opaque quality (I later tested variations with oxides that resulted in a somewhat transparent 200. Successful firing of underglaze copper-red requires extremely precise control of the firing process in order to achieve the best colour, and this vase is a credit to the kiln master responsible for its firing, since the red is exactly the desired rich crushed-raspberry colour. You can also add some gum Arabic or CMC or glycerine or similar additive to make the mixture more brushable. Using one of these will dispense the underglaze finely enough to create an attractive design. I bisque to 1000oc. The missing ingredient I left out is water - with 100 grams of course easily measured out as 100 ml. are produced using a colloidal process. Hold your bisque ware over a bucket. Glaze can be shiny or matt, opaque or transparent, And it can be applied to bisque fired clay before glazing. Underglaze Cobalt - Etsy Check out our underglaze cobalt selection for the very best in unique or custom, handmade pieces from our shops. We could use Weve Been Here The Whole Time | Adero Willard | Episode 917, Gallery Exhibit of clay students and teachers #3, A New Village Potter Resident: Caroline Woolard, an Intentional and Intuitive Potter. - Holly Goring, Editor, Pottery Making Illustrated. Recently we have a veterinarian as a studio member who soon be able to make the same decisions I do. Once the bisque ware had dried again, a clear glaze can be applied and the pottery can be fired again. 537 Spectrum Cobalt Blue Underglaze, 4 oz. Also available in CM in the classified or you could just use Alberta. The carved lines are also called incised lines. Dont have time to read the whole article? The Raku kiln uses gas for fuel and heats up fast, while the electric kiln uses electric coils and heats up much slower. A pleasure to talk with. Today, most commercial underglazes are formulated using frits, which reduce shrinkage, allowing them to be applied to both greenware and bisqueware. It looks like a lot of overlap between these materials. It is, therefore, suitable for decorative rather than functional purposes. Hold the vessel upside down with the lip level and horizontal. Depending on the underglaze technique you are using, its generally recommended that you apply at least 3 layers for opacity. Contact Tori Motyl at Tori@MotylPottery.com. Why do this? You may need to do some test tiles to find the right combination. Underglaze or colored slip is then painted into the scored areas. When the paper is wet, the underglaze separates off from the paper and adheres to your clay. The type of tool you choose is a matter of personal choice. Today sunflower captures the same authentic Spode blue that was born from the original process of under-glaze printing from hand-engraved copper plates. Underglaze manufacturers use a chemical process that employs a high-shear mixing technology When you peel the lino away, you will have a raised, positive impression of your design on the clay. Then, using a sharp tool like a metal rib, they will scrape off the excess underglaze from the unscored areas. When the pottery is fired the wax resist is burnt off leaving a clean surface. High Fire Ceramic Glaze Recipes Malcolm Davis 369 Show detail Preview View more adhesion needed. Cobalt Oxide: CoO is 1.4 times stronger than cobalt carbonate, Cobalt Carbonate: Co3O4 (mix of CoO and Co2O3), CoO and Co3O4, although mainly thought of as colorants, are also strong fluxes, Melting point (oxide): 328F (1805C), not yet volatile even at 2552F (1400C), Strongest coloring oxide: 0.25% noticeably blue in a transparent base glaze, used in a wide array of decal inks, underglaze colors, body stains, and colored glazes, Soluble in glaze melt, thus it has little or no opacifying effect, Very fine particle size, gives more uniform color in glazes, Atmosphere and firing temperature do not change the color, Very dependable color results in both oxidation and reduction conditions, and in fast and slow firing. To that is added a small amount of Redart clay to take off the harshness off the blue a tad by the presence of iron oxide and to improve brushing consistency. You can blow more bubbles are you go along. They I prefer oxide to carb. Copyright 2023 Pottery Tips by the Pottery Wheel. Cobalt aluminate (CoAl2O4, also sold as a Mason Color 6330) is very refractory when used alone with a brushing medium will eliminate any problems studio members have with cobalt oxide bleeding into a covering glaze - so much so, that use of cobalt aluminate over a large area can result in the over-glaze crawling away from the area covered, which some have used to interesting effect. Black glazes are typically achieved using cobalt oxide or cobalt carbonate plus a blend of iron and other metallic oxides. Very simply, spray your shaving foam onto a smooth surface. Because the glass formed in the glaze firing controls the interaction of the glaze elements, what you see in the mixed glaze is almost never the color you get in the fired glaze. That said, one of the challenges of applying it is that it is so pale pink in the raw state that you cannot see it on the surface of your work you can easily smear it or smudge it and not notice until it fires incredibly BLUE. 475 $4.43 100.0% Color Bottles - per bottle, 50 $4.17 11.1% Mason Stain ($8.48 to $37.50) $4.17 average cost per bottle, 25 $0.09 5.6% Zircopax (not for Black, Grey or Taupe - but this caution has been ignored and no one noticed a difference). Oasis Blue - Runny! First, coat your pottery with a layer of underglaze. Brooklyn Museum, The William E. Hutchins Collection, Bequest of Augustus S. Hutchins, 52.87.1.
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