PLEASE NOTE: I do not offer ceramic repair services. I hope this post gives you enough information to try doing your own repairs. Also, you can search for someone who offers ceramic repair services in your area.
A good friend brought this sad collection of shards to me wrapped in brown paper. It wasn't a valuable item, but it was part of a 4 plate set that was a gift from her mother, could I repair it? Yes, yes I could
But first I needed a plastic tub, and a bag of sand.
I learned when I was trained to repair ceramics professionally that the best way to repair a plate, or even the handle on a mug, is to anchor part of the broken item in sand, then balance the part you are gluing on top of it.
I try a dry run, seeing if the piece balances without my holding it, then I apply two part 5 minute epoxy glue.
I test all the pieces for fit first like I discussed in my previous ceramic repair post. I want to be sure to assemble the pieces in the correct order to prevent the sad experience of not being able to fit the last piece because it is "locked out". Sometimes that entails gluing smaller pieces to each other first, thereby making fewer larger pieces to fit together.
I only glue two pieces together at a time. I wipe any glue from areas where I will need to fit another piece using a Q-tip dipped in acetone.
While the glue is still uncured, I run my fingers across the crack line compulsively, seeing if I can detect a ridge that would indicate a poor fit. If there's a ridge, I nudge, delicately, the part that is slightly off so it aligns more accurately, then I check the crack again with my fingertips, sometimes my fingernails, making sure the join is smooth along its entire length.
I do that quickly, before the 5 minute glue sets up, using acetone to clean any excess glue off my fingertips.
Once the epoxy is cured, I fill the cracks and chips with vinyl spackling compound, the kind you would use on drywall. When that dries, I use specialty glass paper (sand paper that won't scratch glass or ceramic) to sand it flat for painting.
Then I mix acrylic paints to match the missing spots, when that dries, I use water based glossy polyurethane to make the painted areas match the shine of the glaze.
The repairs aren't invisible, but from a reasonable distance, no-one would notice!