Readers ask: What Are The Tiny Cracks In Antiques Called?

What do you call small cracks?

fissure Add to list Share. Fissure has its roots in the Latin word fissura, meaning a cleft or crack. If something breaks into fine cracks, you can describe the action with the verb form of fissure.

What are tiny cracks in the glaze of pottery?

Crazing refers to small hairline cracks in glazed surfaces that usually appear after firing but can appear years later. It is caused by a mismatch in the thermal expansions of glaze and body. Most ceramics expand slightly on heating and contract on cooling.

Is crazing a defect?

Crazing is a glaze defect of glazed pottery. Characterised as a spider web pattern of cracks penetrating the glaze, it is caused by tensile stresses greater than the glaze is able to withstand.

What does crazing look like?

Crazing can be present in varying degrees. Sometimes items may have a couple of crazing lines on one side and not the other, other times the crazing can look like a spider web and cover the entire item. The cracks are very small and can usually not even be felt, rather just seen visually.

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What’s a deep crack in the earth called?

A crack in the earth’s crust is called a fault. Faults are also referred to as fractures. Other times, the movement caused by the fracture is of a horizontal nature instead of vertical, so giant cracks will form in the Earth’s outer layers.

Is a fissure a crack?

A fissure is not a crack, and although fissures rarely affect the soundness of the stone, sometimes a fissure can develop into a crack. You will know if this happens because there will be some chipping, separation, and obvious breakage.

What does crazing look like on pottery?

Have you ever seen a piece of pottery where the surface looks like it’s covered with a spider web of tiny cracks? That’s called crazing. They are not cracks in the actual piece of pottery but rather surface-level cracks in the fired glazed of the piece.

How do you fix cracked glazed pottery?

Here is how I fix cracks: Mix up some paper clay from your clay body. Add a few drops of clear glaze and some finely grounded bisque from the same clay as the mug. Clean any dust away and add some clear glaze on the chip. As it dries, it may open up some cracks again, but keep filling it with more paper clay.

What does crazed China mean?

Crazing. divgradcurl / Getty Images. Crazing translates to fine cracks in the glaze or surface layer of porcelain wares. It can also occur in pottery, some plastics, and composition materials (such as the face of a composition doll that has not been properly stored).

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How do you fix crazing?

In practice, the most effective ways to correct crazing are:

  1. increase the silica, in body or glaze.
  2. decrease the feldspar, in body or glaze.
  3. decrease any other material containing sodium or potassium.
  4. increase the boron.
  5. increase the alumina, i.e. the clay content.
  6. increase lead oxide.

How do you get rid of crazing?

Try Hydrogen Peroxide Red and brown stains can set into the crazing over time. This can give the overall dish a dirty or aged look. To remove the staining on white porcelain, How To Clean Stuff recommends soaking the dishes in hydrogen peroxide.

How do you cause crazing?

What are the key causes of crazing?

  1. Temperature and humidity changes which causes the glaze to crack.
  2. It can be caused by moisture getting into the glaze and forcing cracks in the glaze.
  3. It can be caused by being bumped or knocked repeatedly, causing small cracks in the glaze.

How do you know if crazing is real?

Gently tapping your piece of china can tell you if something is amiss. A teacup and saucer or other pieces that produce a thud or dull ring instead of a clear ring can indicate crazing. Stained pieces are often clear signs that crazing is present as the dirt is now trapped.

What is the difference between cracking and crazing?

As nouns the difference between crazing and crack is that crazing is a covering of fine cracks on a hard smooth surface such as a glazed object or car exterior while crack is (senseid)a thin and usually jagged space opened in a previously solid material.

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How do you get rid of crazing on China?

Steps to Remove the Stain:

  1. Fill the plastic tub with enough hydrogen peroxide to cover the china.
  2. Add china pieces to the tub.
  3. Cover with the lid and allow china to soak for approximately 48 hours.
  4. Remove china pieces from peroxide and rinse with clean water.

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