[eaxsharpe]

DAS said:

The values you should take are the parameters production will give you as reference. X value measured in X sample with X spindle on X meter during X time at X temperature. If you are dealing with non Newtonian fluids they should give you a table. Measurement without reference means squat. You can consider it “stable” if the sample fits the parameters, nothing else. 

Window said:

Are you being asked to assess the stability of old product (previously tested fresh by someone else), or are you designing a process for testing stability from start to finish?

We are working on bringing a stability program in house as higher-ups discuss the possibility of bringing formulation in house so I don’t really have any benchmarks unless I am able to get the data from the CMOs that are currently producing our products.

I spent a bit of time making sure the starting height of the T-bar is the recommended 1/4″ above the top of the material and it stops well before the end of the beaker. I’ve also used the spindle tables from Brookfield to start with what seems like the spindle for high viscosity (T-F, 96). Is it possible the hair mask is too thick to read a consistent value? Or as it spins down into the material its getting increasingly harder to move? 

[eaxsharpe]

Hi everyone! 

My name is Emily Anne, new to the cosmetic formulation world. My background is in CO2 reduction using inorganic/organometallic catalysts I synthesized and tested. I learned quickly that a PhD was not the route for me and after receiving my MS in Chemistry (Dec 2017), I am ready to break into the cosmetic industry! I am deep into Perry’s formulating course and hope perusing this forum will help me gain a working knowledge of the field as I look for a entry-level formulation position