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Tips For Firing Red, Orange And Yellow Glazes

Are you having trouble getting your red, orange and yellow glazes to turn out brightly colored?
These colored glazes are the ones that people have the most trouble with.
Here are a few tips for getting bright colors with working with them.



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Pottery and Ceramics Definitions

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Glazes and Decorating Pottery

All About Pottery Glazes

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Toxic Ingredients used in Glazes
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Troubleshooting Glaze Cracking
Glazing Defect and Remedies
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High Bisque Low Glaze
Making a Hydrometer
What is an Overglaze
Lead Testing an Overglaze
Refinishing Bought Pottery
Surface Tension and Glazing
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Firing Copper Matte
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Red, Yellow and Orange Glazes
Making Test Tiles for Glazes
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Using a Viscosity Cup







Oxygen

Most commercial glazes are designed for use in an oxidizing
environment, usually in an electric kiln.
Red, orange and yellow are
particularly sensitive to the amount of oxygen that is in the air.
All clay has carbon in it, much of which burns out in the early stages of firing.
This creates carbon monoxide, which will affect the glaze if it hangs around.
So, you want to have plenty of air flow, to remove this carbon monoxide as quickly as possible.

If you fire with a vent, you should be getting enough oxygen in the kiln.

If you do not have a vent, make sure the lid is propped and peephole plugs are out. With manual venting such as this, it is also best to put colors such as red on the top shelf where they will get more oxygen.
Do not crowd the kiln, leave room for the pieces to breathe.

Firing Rate

Fire your bisque very slow to Cone 04 to burn out the organics.
Glaze firing is a little tricky.
Sometimes it is recommended to fire fast and sometimes fire slow.
The theory of firing slow is to make sure that carbon monoxide isn't being created faster than it can be replaced with fresh air.
Sometimes a fast glaze firing which is about 3 to 4 hours is preferred, particularly with non-inclusion or cadmium red glazes, where the color can burn out if fired slow.

Sometimes a glaze on one piece will affect the color of the glaze on another piece.
This is particularly true if you are firing without a vent
Keep colors such as red separated from other colors for best results.
Copper glazes are specifically known to interfere with these colors in many cases, so keep green colors away.

Application

In most cases, it is best to apply the glaze thick, sometimes
as many as four coats is required.
Amaco says to apply about twice as much with your reds, oranges and yellows as you would apply with a normal color.

Firing Temperatures

Make sure you use witness cones to see that the glazes are fired to the proper temperature.
It is very important to not over fire.
Often these glazes do not like to go above Cone 06.
Sometimes they do better fired at Cone 07 or even 08.
Now, bisque should be fired at a mature Cone 04 to make sure organics are burned out.

Do not use red, orange or yellow glazes on greenware, only on bisque.

It may help to fire your bisque hotter than usual, so as to burn out more of the carbon during the bisque firing.

White clays usually have less organic content, so they will give better results.

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Have you ever come up with a good idea while working with your handmade pottery and thought that you would like to share it with others? You have? Well, why not send it to us and we will add it to the tips page for all to see.

Handmade pottery can be a very gratifying hobby that produces fun and satisfying results. For many people it's an enjoyable release that is created by working an inanimate mound of clay into a beautiful work of art that you made through your artistic abilities.

The best way of starting out is to take a few lessons from Youtube. You will probably waste quite a bit in materials when you first get started. Figuring out how to truly make handmade pottery correctly and shape into what you want it to be can be quite an ordeal. The different tools that a normal shop will have can be fun to try. You will soon see which ones you like to use the most and then when you are ready you will know which ones to buy.

With the help of the internet, you can now purchase most if not all of your ceramic and pottery tools and supplies online. We are located far from any well supplied dealers and yet working with reliable ceramic and pottery suppliers online has allowed us to recieve most of our orders within a timely manner.

When you get all set up, just enjoy the hobby and have fun at it. Some people get pretty serious and start selling their creations at craft fairs and small stores, but others just like to create items for themselves, relatives, and friends. Whichever kind of handmade pottery you desire to endeavor, enjoy the hobby and have fun doing it.

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