SP29 - Clear
SKU: 20029-PT Brand: Seattle Pottery Supply
$16.50
SP29 - Clear, Zinc-free
For CONE 4 - 6
A zinc-free midrange clear glaze.
SPS glazes are made in small batches in Seattle, WA. Lead free and safe for dinnerware.
Mid-range glazes, such as this, should be used on mid-range clay (meant to be fired to cone 4 - 6).
To apply: Always mix first before each use! Then brush or dip onto bisque-fired pottery (pottery that has been fired to cone 08 - 06).
If brushing, apply three layers, alternating the direction of the brush strokes with each layer to create a smooth finish. Let dry completely between each coat (until it completely loses its sheen), but do not over-dry or the glaze may crawl.
If dipping, dip and hold in the glaze, then remove from the glaze and shake off the excess. The amount of time you hold the piece in the glaze will dictate the thickness of the coat. We recommend 1 dip. A second layer can be applied, but more layers can result in the glaze running off the pot. Let dry until it loses its sheen between each coat if you are adding additional coats.
If the consistency seems thick, first mix thoroughly. If it still seems thick, add water SPARINGLY to thin it down. If too thin, leave the container open to let some of the moisture evaporate.
Note that mixing glazes together or applying one on top of the other may cause the glazes to react differently than you expect. We recommend that you always test a new glaze combination and clay/glaze combination to see how it performs.
For a more in-depth how-to, check out Pottery Glazing Techniques.
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Mid-range glazes, such as this, should be used on mid-range clay (meant to be fired to cone 4 - 6).
To apply: Always mix first before each use! Then brush or dip onto bisque-fired pottery (pottery that has been fired to cone 08 - 06).
If brushing, apply three layers, alternating the direction of the brush strokes with each layer to create a smooth finish. Let dry completely between each coat (until it completely loses its sheen), but do not over-dry or the glaze may crawl.
If dipping, dip and hold in the glaze, then remove from the glaze and shake off the excess. The amount of time you hold the piece in the glaze will dictate the thickness of the coat. We recommend 1 dip. A second layer can be applied, but more layers can result in the glaze running off the pot. Let dry until it loses its sheen between each coat if you are adding additional coats.
If the consistency seems thick, first mix thoroughly. If it still seems thick, add water SPARINGLY to thin it down. If too thin, leave the container open to let some of the moisture evaporate.
Note that mixing glazes together or applying one on top of the other may cause the glazes to react differently than you expect. We recommend that you always test a new glaze combination and clay/glaze combination to see how it performs.
For a more in-depth how-to, check out Pottery Glazing Techniques.
- Brand
- Seattle Pottery Supply
- Type
- Midrange Glazes
- Firing range
- Midrange ∆4-6
- SKU
- 20029-PT
- Weight
- 1.68 lb
- Availability
- In stock & ready to ship
| SKU | Wet or Dry | INVENTORY | ORDER ELIGIBILITY | PRICE |
|---|---|---|---|---|
| 20029-PT | Wet / 1 Pint | 5 in stock | While supplies last | $16.50 |
| 20029-QT | Wet / 1 Quart | 2 in stock | While supplies last | $28.95 |
| 20029-1GAL | Wet / 1 Gallon | Out of Stock | Please call | $92.00 |
| 20029-5GAL | Wet / 5 Gallon | Out of Stock | Please call | $275.00 |
| 20029-1LB | Dry / 1 Pound Bag | 6 in stock | While supplies last | $10.50 |
| 20029-5LB | Dry / 5 Pound Bag | 4 in stock | While supplies last | $51.00 |
| 20029-10LB | Dry / 10 Pound Bag | 2 in stock | While supplies last | $97.00 |
| 20029-25LB | Dry / 25 Pound Bag | 1 in stock | While supplies last | $217.00 |
| 20029-50LB | Dry / 50 Pound Bag | Out of Stock | Please call | $359.00 |
*Back orders will be placed for order quantities exceeding that of on-hand inventory.
Questions & Answers
-
Does this work well with the speckled grey? It says on bisqued 08-06 but I thought the speckled grey was meant to be bisqued to 04
Not sure where you saw the bisque temperatures but 06-04 is usually what we bisque to, and then fire grey speckle to cone 5. -
I used blue underglaze on some cups and then I dipped the cups in Clear SP29. I fired them to cone 4. The clear did not come out smooth as expected. I had thought that the once dipped would have been enough. Is it recommended to dip the cups again and fire again at cone 4? Dip more than once since I assume it won't cover quite as well? Thanks.
The thickness of dipping glazes on pieces will very based on thickness of the glaze and how long you dip for. If the glaze surface is too thin, you may have glaze that is too thick or thin, or have not dipped for long enough. -
Is this glaze food safe or not?
Unless otherwise stated in the description, our in house glazes are food safe. When properly applied and fired this glaze is dinnerware safe. Always check for pin holing, crazing, bloating, glaze thickness, etc. -
Do you offer free shipping? Like buy so many $ for free shipping?
We do not offer free shipping, though we do have discounts on certain items when you buy in bulk. -
Does this clear work well with the smoother more porcelainous midrange clays available? My reason for asking is that at times, I find when using the really smooth clays, that there are cracks in the finish of some of the clear glazes I have used. Much thanks
Our SP29 is made for use on our midrange clays and should work on the porcelains.If you are running into issues with crazing it may be that the glaze itself is too thick or that your are applying it too thick. This can cause issues with thermal expansion and cooling as the porcelain shrinks at a different rate than the glaze. Try thinning your glaze a bit and do some test tiles with variations on the amount of glaze being applied. -
I bought a gallon of SP29. Am I able to brush this on or do I have to dip into the gallon? I have some plates that are too big to fit into the bucket so I’d prefer to brush it on if possible.
You can absolutely use this a brushing glaze! It might need a few more layers of brushing it it's pretty thin in your bucket. If it's on the thicker side than it should be okay at 2-3 layers.
-
What is the ratio for dry glaze to water?
You should use approximately 11oz of water per 1lb of dry material. -
Can you buy the wet pint to dip underglazed pendants in it? Or do you have to buy the dry pint? Sorry to ask the question again, I entered the wrong email initially.
You can buy this in either wet or dry. In the drop down menu, you can select either wet or dry, and then the size of the container that you want. -
Is this a zinc-free clear glaze?
Yes, SP29 is zinc free clear.
