Pottery made to order | repair and restoration studio in Southern Delaware

How to Remove Old Adhesive or Glue From Broken Ceramic?





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Repair Lessons
(click pictures)

Fixing broken plate lesson - basic lesson
Cementing only lesson
Fixing chipped Italian platter lesson step-by-step lesson
Chipped pottery repair lesson

Fixing broken vase - more complex repair
Restore vase lesson
How to Replace Stoneware Crock's rim using the potter's wheel
How to replace Stoneware crock's rim
Remove old repair, Mend the broken segments, fill gaps, sand filler, paint and glaze the repaired areas
Pottery and ceramic repair - all steps
kintsugi - mending broken pottery with gold
Kintsugi - mending with gold
How to repair crack in ceramic
How to fix ceramic crack
Restoring multi breaks and missing piece antique bowl
Restore bowl lesson w/ missing pieces
How to paint broken china, ceramic or pottery?
Painting pottery after repair
Restoring ceramic sculpture with missing pieces using fired clay
Sculpting missing pieces
Cybis Arion Boy on Dolphin - Repair Broken and Missing Finger
Miniature repair w/ missing finger
Restoring ceramic sculpture with missing pieces using fired clay
Making missing part w/ fired clay
Repairing broken plaster of paris tall lamp
Plaster lamp repair w/ missing parts
Restoring small porcealin figurines - shoe
Miniature Porcelain
Repairing broken stone sculptures and statues
Repairing broken stone sculpture

The first step in removing old adhesive is to determine what type of adhesive it is; epoxy, Super glue (Cyanoacrylate), silicon, contact cement or water base glue.


There are four methods to remove the old adhesive used based on:

A) What glue is it

B) Is the material the glue is applied to porous or non-porous *

C) What instrumentation is available to you

* Non-porous material examples are: Porcelain, china, stoneware, metal.

* Porous material examples are: Earthware, stone, plaster, wood



Removal Methods:

1) Solvent
2) Boiling water
3) Torch
4) Mechanical separation by cutting the mended connection
5) Kiln firing (reserved for professional potters only)

Using a sharp object, poke the old adhesive. If it is flexible, it is most likely not Epoxy and may be dissolved

Removing old glue or adhesive from potery or ceramic old repair

Wear eye protection, a mask and operate in a ventilated room!!



Video: How to Remove Old Adhesive Using a Torch?






1) Using Solvent
One-part cements, such as Contact Cement or Super Glue (Cyanoacrylate), are dissolvable.

Steps:

1) In a ventilated room and wearing a mask, saturate the cemented areas with Acetone and wait for several minutes or until you sense softening.

2) If the cemented parts do not separate, apply some pressure to separate them

3) Scrape off the softened adhesive and clean surfaces with alcohol

Warning: Before applying the Acetone make sure you do a small test on your object to verify that the Acetone will not ruin your item. Acetone will instantly damage any polymer based product (paint, varnish, plastic). Apply all the safety instructions for using Acetone including ventilation, gloves, mask and eye protection.

Possible side effect: The dissolved adhesive may absorb and stain porous surfaces.



Clear 2-part epoxy



2) Using Boiling Water
Most adhesives will soften up after they are immersed in boiling water.

DO NOT use with stone or plaster objects!!

Steps:

1) When heating the ceramic in water, do not drop the item in boiling water to avoid cracks due to thermal shock. Place the ceramic object in room temperature water and start the heating with the object in the water.

2) After it is boiling for 2-3 minute, inspect the object to see if the cemented parts are separated or can be separated with light pressure. If yes, use heat mitts to hold the hot item and with a razor blade, while hot, remove the remaining epoxy.

3) Grinding with a metal brush may be required if some epoxy still remains

4) Clean surfaces with alcohol

Possible side effect: The dissolved adhesive may absorb and stain porous surfaces.



Using boiling water to remove old glue or adhesive
Electric water heater


3) Using a Torch - the most common way used in our studio
This method requires experience with using a torch and how to apply the flame on the surface without causing damage. See video above. 

Steps:

1) Heat the cemented areas with a continuous movement and with the flame not too close to surface

2) The heated areas need to build temperature uniformly

3) Apply pressure to separate the bonded segments

4) Once separated, grind or use metal brush to remove the adhesive

5) Clean surfaces with alcohol

Possible side effect: Heat builds up in one area can cause cracking.

Warning: Use in a ventilated area with eye protection



using a mini torch to remvoe old adhesive
Blazer GB4001 Stingray Butane Torch

 

4) Mechanical Separation - Cutting The Mended Connection
With plaster objects or when all else fails, use this method.

Worst case scenario is when the old adhesive was used on porous materials such as terracotta, stone or plaster. The old adhesive soaks into the material's porous surface and the full depth of penetration needs grinding.

Steps:

1) Use a Dremel cutting disc (diamond disc and under running water for ceramic) to cut through the mended line.

2) Once separated, grind or use metal brush to remove the adhesive

3) Clean surfaces with alcohol

Possible side effect: Cutting removes the adhesives but it also removes some of vessel's material which effects the broken pieces' fit requiring more fill, more sanding, more painting, thus, more complex repair.

Warning: Use in a ventilated area and with eye protection

Dremel set

dimond burs

 




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