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Abrasiveness in toothpaste
Hi there
A lady on this forum kindly stated that toothpaste abrasive needs to be 20uM.
The certificate which I obtained from the chemical factory says this and I would appreciate from anyone in this industry to tell me if this calcium carbonate is ok or off kilter before I buy the 25kg. Much appreciated ofcourse.
CaCo3>94.5
Acid insolubles:<1.5%
Residue on 160uM<3.0%
Particles <15uM 45.0 -55.0%
Brightness> 92.5%
Moisture ex works<0.4% -
4 Replies
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abrasiveness isn’t necessarily related to particle size, but more to the hardness of those particles. Calcium carbonate is a common ingredient in toothpaste and there are grades designed for toothpaste - check with your chemical supplier if your grade is suitable (Omya have some great grades for toothpaste).
The abrasiveness of the toothpaste will need to be tested separately. Ther eare a number of labs who offer this service. Though what surprised me, is that one testing lab reported results half the abrasiveness as reported by a different lab.
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Just checked the material we buy for toothpaste - ours material is a grade designed for toothpaste and has a mean particle size of µm and is of agglomerated scalenohedral calcite crystals and is more of a toothpolish.
We use another grade also for toothpaste, this one is more abrasive, particle size is 90% in 5-10 µm range.
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Hi @Herbnerd ? I’m not going to pretend I understand this.
Where is OMYA, in which country?
What I understand from this is that up to 50% of the particles at smaller than 15uM , so where does that leave me with what size the rest of the 50% is …huh? ?
I asked them, they did not give me a clear answer. So I understand correctly, I need to take this to a lab to test it for abrasiveness?
Perhaps I need to buy calcium carbonate from abroad….oh dear…
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OMYA, I believe is a global company, but they may have distribution agents in some countries. https://www.omya.com/
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