Login here. First, note that this process is never predictable. In most cases you can make a new piece in less time than you can spend re-glazing it, with much more predictable results. But sometimes there is that piece you can't part with and really want to re-glaze. Here are some things you can try to increase your success rate. The goal, of course, is to get the new glaze to stick to the old glaze.
Microwave the piece for 30 seconds. Some potters say this makes a huge difference, and the piece doesn't need to actually get or stay hot. To improve your odds further, wash the pot first with ammonia or detergent, wearing rubber gloves, and don't touch it.
But I want to tell you not to worry. Help is here. There is nothing wrong with making mistakes while glazing your piece.
I can remember the weeks it took me to perfect my glazing skills. You might need to try glazing a few pottery items over and over again. But what do you do to your previously glazed ceramics with defects? Do you just throw them away? There is something you can do. It is called Reglazing. Re-glazing, as the name implies means glazing your previously glazed ceramics. Reglazing is usually done to pottery pieces that have some glazing defects or problems. Reglazing is muchly done after the bisque firing or the final firing.
It is easily possible to reglaze a ceramic that has been fired before. Some potters tend to paint the new glaze on the finished pottery and then fire in the kiln at high temperatures. Some say this is known as Overglaze on Overglaze. Ceramic products are glazed by baking chemicals onto the pottery piece at very high temperatures.
Removing the glaze can be done by sanding the surface of the piece. Sanding is usually done to prepare a glazed tile surface before it is painted all over again. Clay surfaces that are frequently exposed to water should not be painted as the paint can be easily removed when this occurs. Make sure you wear safety glasses, protective clothing, and a respirator to protect yourself from debris and dust generated while sanding the glaze from the ceramic.
After sanding the ceramic, make sure you dust the ceramic and clean up the room. You can apply a fresh new glaze on the piece and the fire. Reglazing can be a bit of tasking but there are quite a few steps to it. Below are the steps you should take if you ever want to reglaze your artwork.
If you are going to reglaze a pottery piece, it is vital to brush up a thin layer of glaze first. This is to make sure that the clay body has a uniform look and also the expansion ratio is adequate for a new underglaze or overglaze. This step is important if you have removed the previous glaze on the pottery. After you have applied the thin layer of glaze, the next thing to do is to air-dry.
You should leave the piece to dry for about an hour. Make sure you are not drying it in extreme heat temperatures. The importance of spray starch in the process of reglazing cannot be overemphasized.
The starch acts as a temporary glue that will tighten the clay body for the new glaze to be applied. Later in this article, I am going to talk about the negative impacts a loose or lower clay body has on the ware after glazing.
Before you apply your glaze, it is advisable to stir it well even if you are using a premixed glaze if not, there will be a defect on your wares.
After you are done mixing the glaze, keep each glaze separately with its brush. Decorate your project with the brushes dipped in underglaze. You can get creative with it by flicking the brush or making twirls and twists.
It depends on your taste and preferences. Sticky hair spray is a solution for underglazes. It worked well, but the "Spooze" recipe seems to work better, so I stopped ordering the Enhancer. Some of my glazes have substantial clay content that they will stick to a glaze-fired surface. While the oven is heating the pizza, spray the inside of the pot with an aerosol adhesive, then spray the inside with your glaze. By that time, the pizza should be done. Others suggest using a spray starch.
If you are reglazing with a different glaze, do you need to worry about glaze compatibility? Is there any danger of damage to the kiln from incompatible glazes? Usually not, but then again to this does depend on glaze maturation temp. I would not spray a bristol zinc white glaze over some colors, as it will gray them out, but most transparent, or even opaque tin or zircopax whites can work well.
At least in my humble opinion. Some glazes can really run when you refire them or layer two glazes, if in doubt put the pot on a scrap waster piece of bisque so if it does run it won't run onto your kiln shelf. By using this site, you agree to our Terms of Use.
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