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Q. Do you have to re-coat the kiln shelf with primer every time you use it?
A.
Q. Do you have to re-coat the kiln shelf with primer every time you use it?
Q. Do you have to re-coat the kiln shelf with primer every time you use it?
If the shelf primer is in good condition it can be used more than one time. The shelf should be
Q. Do you have to re-coat the kiln shelf with primer every time you use it?
Q. Do you have to re-coat the kiln shelf with primer every time you use it?
scraped, sanded or washed clean with clear water and re-coated when the primer shows signs of wear.
If the shelf primer is in good condition it can be used more than one time. The shelf should be
If the shelf primer is in good condition it can be used more than one time. The shelf should be
It’s time to re prime when the coating becomes thin (usually where a project rested) has cracks, or
scraped, sanded or washed clean with clear water and re-coated when the primer shows signs of wear.
scraped, sanded or washed clean with clear water and re-coated when the primer shows signs of wear.
begins to fl ake off.
It’s time to re prime when the coating becomes thin (usually where a project rested) has cracks, or
It’s time to re prime when the coating becomes thin (usually where a project rested) has cracks, or
Q. Why does kiln wash stick to the back of a project?
A.
Q. Why does kiln wash stick to the back of a project?
Q. Why does kiln wash stick to the back of a project?
This is usually the result of exhausted kiln wash; the shelf should have been re-primed prior to use.
Q. Why does kiln wash stick to the back of a project?
Q. Why does kiln wash stick to the back of a project?
It may also occur when the glass has been fi red to too high a temperature or kept at full fuse too long.
This is usually the result of exhausted kiln wash; the shelf should have been re-primed prior to use.
This is usually the result of exhausted kiln wash; the shelf should have been re-primed prior to use.
The kiln wash can be removed with fi ne steel wool or a scraping tool. Stubborn patches can be soaked
It may also occur when the glass has been fi red to too high a temperature or kept at full fuse too long.
It may also occur when the glass has been fi red to too high a temperature or kept at full fuse too long.
off with bathroom cleaning products used to remove hard chemical residue.
The kiln wash can be removed with fi ne steel wool or a scraping tool. Stubborn patches can be soaked
The kiln wash can be removed with fi ne steel wool or a scraping tool. Stubborn patches can be soaked
Q. After the project is fused, how close to room temperature do you have to be before opening
the kiln lid?
Q. After the project is fused, how close to room temperature do you have to be before opening
Q. After the project is fused, how close to room temperature do you have to be before opening
A.
How badly do you want the project inside?
Room temperature is usually well below 100
How badly do you want the project inside?
How badly do you want the project inside?
°
F. If you
open the lid prematurely thermal shock can occur; breakage caused by changing temperature too fast.
How badly do you want the project inside?
How badly do you want the project inside?
Room temperature is usually well below 100
Room temperature is usually well below 100
How badly do you want the project inside?
How badly do you want the project inside?
How badly do you want the project inside?
How badly do you want the project inside?
. If you
. If you
Just a quick
open the lid prematurely thermal shock can occur; breakage caused by changing temperature too fast.
open the lid prematurely thermal shock can occur; breakage caused by changing temperature too fast.
peek
open the lid prematurely thermal shock can occur; breakage caused by changing temperature too fast.
open the lid prematurely thermal shock can occur; breakage caused by changing temperature too fast.
in to the kiln, done too early can ruin your day. Wait, it will be worth it!
open the lid prematurely thermal shock can occur; breakage caused by changing temperature too fast.
open the lid prematurely thermal shock can occur; breakage caused by changing temperature too fast.
peek
peek
open the lid prematurely thermal shock can occur; breakage caused by changing temperature too fast.
open the lid prematurely thermal shock can occur; breakage caused by changing temperature too fast.
open the lid prematurely thermal shock can occur; breakage caused by changing temperature too fast.
open the lid prematurely thermal shock can occur; breakage caused by changing temperature too fast.
Q. What causes tiny bubbles and how do I get rid of them?
A.
Q. What causes tiny bubbles and how do I get rid of them?
Q. What causes tiny bubbles and how do I get rid of them?
Air becomes
Q. What causes tiny bubbles and how do I get rid of them?
Q. What causes tiny bubbles and how do I get rid of them?
trapped between the layers of glass when it is heated. The number and size of the air
Q. What causes tiny bubbles and how do I get rid of them?
Q. What causes tiny bubbles and how do I get rid of them?
bubbles can be reduced by heating the glass more slowly between the temperatures of 1000 – 1465
trapped between the layers of glass when it is heated. The number and size of the air
trapped between the layers of glass when it is heated. The number and size of the air
°
F
trapped between the layers of glass when it is heated. The number and size of the air
trapped between the layers of glass when it is heated. The number and size of the air
.
This gives the air more time to escape before the glass edges become sealed.
bubbles can be reduced by heating the glass more slowly between the temperatures of 1000 – 1465
bubbles can be reduced by heating the glass more slowly between the temperatures of 1000 – 1465
Q. How do I avoid big bubbles?
A.
Q. How do I avoid big bubbles?
Q. How do I avoid big bubbles?
Large dome shaped bubbles will sometimes rise up in the middle of a medium - large (4” x 4” or
Q. How do I avoid big bubbles?
Q. How do I avoid big bubbles?
bigger) projects. This is usually the result of fi ring too fast on a ceramic kiln shelf. The outer edges
Large dome shaped bubbles will sometimes rise up in the middle of a medium - large (4” x 4” or
Large dome shaped bubbles will sometimes rise up in the middle of a medium - large (4” x 4” or
of the project become soft fi rst and form a “seal” on the shelf. Air becomes trapped under the glass.
bigger) projects. This is usually the result of fi ring too fast on a ceramic kiln shelf. The outer edges
bigger) projects. This is usually the result of fi ring too fast on a ceramic kiln shelf. The outer edges
When it expands it lifts the glass. This is less likely to happen when using shelf paper or a fi ber board
of the project become soft fi rst and form a “seal” on the shelf. Air becomes trapped under the glass.
of the project become soft fi rst and form a “seal” on the shelf. Air becomes trapped under the glass.
kiln shelf, as the air can escape through the porous materials. Best advice is to slow down the fi ring
When it expands it lifts the glass. This is less likely to happen when using shelf paper or a fi ber board
When it expands it lifts the glass. This is less likely to happen when using shelf paper or a fi ber board
process.
Q. Can I stack kiln shelves?
A.
Not recommended. Unlike ceramics, glass is thin and reacts to heat quickly. Stacking shelves
causes uneven heating. The outer edges of the project become molten before the center has a chance
Not recommended. Unlike ceramics, glass is thin and reacts to heat quickly. Stacking shelves
Not recommended. Unlike ceramics, glass is thin and reacts to heat quickly. Stacking shelves
to react; your fi ring results will be inconsistent.
causes uneven heating. The outer edges of the project become molten before the center has a chance
causes uneven heating. The outer edges of the project become molten before the center has a chance
Q. How does the thickness of the glass relate to my target temperature?
A.
A project made with two layers of thin fusible glass will usually reach the desired “look” before a proj-
ect made with two layers of 1/8” glass. When you change project sizes or materials (thin vs. 1/8”) you
A project made with
A project made with two layers of thin fusible glass will usually reach the desired “look” before a proj-
two layers of thin fusible glass will usually reach the desired “look” before a proj-
will want to monitor the fi rst few fi rings and make any necessary adjustments to your fi ring schedule.
ect made with two layers of 1/8” glass. When you change project sizes or materials (thin vs. 1/8”) you
ect made with two layers of 1/8” glass. When you change project sizes or materials (thin vs. 1/8”) you
Q. Can more that one project be fi red in the kiln at one time?
A.
Q. Can more that one project be fi red in the kiln at one time?
Q. Can more that one project be fi red in the kiln at one time?
Yes, as long as the projects are similar.
Q. Can more that one project be fi red in the kiln at one time?
Q. Can more that one project be fi red in the kiln at one time?
They should be made from the same thickness glass,
Q. Can more that one project be fi red in the kiln at one time?
Q. Can more that one project be fi red in the kiln at one time?
have the same number of layers and be close is size.
Yes, as long as the projects are similar.
Yes, as long as the projects are similar. They should be made from the same thickness glass,
They should be made from the same thickness glass,
Use a fi ring speed for the largest project.
They should be made from the same thickness glass,
They should be made from the same thickness glass,
Small
They should be made from the same thickness glass,
They should be made from the same thickness glass,
projects will not be harmed by fi ring slowly but a large project will suffer if rushed.
have the same number of layers and be close is size.
have the same number of layers and be close is size.
Use a fi ring speed for the largest project.
Use a fi ring speed for the largest project.
Frequently Asked Questions
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