GP-43 is a ceramic grade TCP powder developed for bone China, imitation bone porcelain, and ceramic formulas that need a stable calcium phosphate source.
From the test data, GP-43 contains about CaO 48.84% and P₂O₅ 45.94%. This is the key reason it is used as a phosphate raw material for bone China. It brings calcium and phosphate into the body or glaze formula in a more controlled way.
The impurity level is also important. Fe2O3 is about 0.11%, which helps reduce the risk of grey or dirty fired tone in white ceramic systems. Your whiteness test also shows a clean fired result, with L* around 81.62 under the tested condition. For bone China producers, this matters because the fired body needs to look clean, not yellow or dull.
GP-43 is supplied as powder, with 325 mesh processing available. The particle size report shows a measured powder distribution suitable for ceramic mixing and milling. For body formulation, this helps the material blend more evenly. For glaze adjustment, it gives you a better starting point than coarse calcium phosphate material.
This product is mainly tested when you are working on:
- bone China body formulation
- imitation bone porcelain
- bone China glaze adjustment
- white ceramic systems needing CaO + P2O5 input
If your current formula has problems such as weak fired strength, unstable whiteness, poor body-glaze matching, or unclear phosphate input, GP-43 is the material worth checking first.
Do not rebuild the whole recipe at once. Start with your current bone China body or glaze formula, then test GP-43 step by step. Check fired whiteness, strength, shrinkage, and glaze fit together. For bone China, flat test tiles are not enough - thin cups, bowls, and shaped pieces usually tell the real story.
GP-43 Technical Data
|
Item |
GP-43 Ceramic Grade TCP |
|
Product type |
Tricalcium phosphate powder |
|
Main role |
Calcium phosphate source for ceramics |
|
Main oxides |
CaO + P2O5 |
|
CaO |
About 48.84% |
|
P2O5 |
About 45.94% |
|
Fe2O3 |
About 0.11% |
|
Physical form |
325 mesh powder / lump form available |
|
Main application |
Bone China body, bone China glaze, imitation bone porcelain |
|
Grade direction |
Ceramic grade only |
Where do Our Customers Actually Use GP-43?
When Bone China Needs Better Strength, Whiteness, or Glaze Fit. In bone China production, the problem is often not only one thing.The body may be thin and not strong enough.The fired color may look slightly dull.Or the glaze may not sit on the body as smoothly as expected.
This is where GP-43 ceramic grade TCP powder becomes worth checking.
With CaO 48.84% and P₂O₅ 45.94%, GP-43 gives the formula a stable calcium phosphate source. It can be tested in bone China body formulation, imitation bone porcelain, and bone China glaze adjustment when you want cleaner whiteness, better fired strength, or a closer body-glaze match.
For imitation bone porcelain, it helps move the formula closer to a bone-China-style system without relying on traditional bone ash.
For glaze adjustment, GP-43 is not used as a normal flux. It is more about checking whether the glaze chemistry works better with a phosphate-bearing body.
A simple way to start: do not rebuild the whole recipe first. Test GP-43 in your current body or glaze system, then check fired whiteness, strength, shrinkage, and glaze fit together.
FAQ
Q: Is GP-43 mainly for bone China?
A: Yes. Bone China body and bone China glaze are the main directions.It can also be tested in imitation bone porcelain if the formula needs a calcium phosphate source
Q: Can TCP improve whiteness by itself?
A: Not by itself.It can help support a cleaner bone China system, but whiteness still depends on the whole formula, iron content, firing temperature, glaze match, and body recipe..
Q: Can I use GP-43 in glaze?
A: Yes, but do not treat it like a normal glaze flux.For bone China glaze, GP-43 may help when the glaze needs to stay closer to a phosphate-bearing body. The glaze formula and firing curve should be tested together.
Q: Is this food grade TCP?
A: No.GP-43 is supplied for ceramic use only.
Start a GP-43 Trial
Send your bone China formula direction, firing temperature, and target problem - strength, whiteness, or glaze fit. We will help you decide how to test GP-43 before you make a larger formula change.
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