How to Repair a Long Hairline Crack on Ceramic and Pottery with Strong Mechanical Integrity
We often receive valuable ceramic items with long hairline cracks and we need to decide if we should break the crack completely for a better cementing job. When the hairline crack goes through design details and breaking it will increase the required repair areas, we often use the "pegging" method illustrated below. The pegging technique ceramic repair requires the walls of the vessel to be thick enough to accept a peg.
When pegging is done properly, it is an excellent way to restore durability to the repaired ceramic object with a hairline crack prior to continuing the restoration process. Below, we repair a cracked jar with some step by step illustrations and explanation. To see examples of a cracked bowl, cracked mug, cracked plate, cracked vase, cracked urn or a cracked jag, see our restoration examples page: http://lakesidepottery.com/Pages/Pottery-tips/how-to-fix-a-crack-in-pottery-or-ceramic.html
Lakeside Pottery Restoration Lab, August 2014