Dear Formulators,
I manufacture Liquid Sindoor (Red colored liquid used by Indian Women after marriage to be applied on forehead).
I am wondering which thixotropic agent is better
A- Xanthan gum
B - CMC (Carboxy methyl cellulose)
The formulation contains
Water - Qs
polyacrylate used as film former (neutralized by TEA) .
Anti suspending agent
Adhesive agent (PVPK 30)
Note - This is not a rinse off application, The product will stay on the skin for the whole day.
Thanks in advance !
Comments
The reason for using a thixotropic agent is that we need product with same consistency to withstand temperature variations, transport stress & longer shelf life.
For example - When using Dermacryl 79 1 kg, we need 500gm of TEA to neutralize. However, while using 1kg of carbomer 980, we need 200 gm of TEA. How would we neutralize when both Dermacryl & carbomer are put in one aqueous solution?
In our experience, we can modulate viscosity of Xanthan Gum by adding or subtracting water, but carbomer once neutralized we find it difficult to modulate to desired viscosity.