[doris_vargas]

Yes, in the US. The bottle didn’t have any ingredients label even in the bottom. 
In the back, only instructions to apply, made in USA, website, PAO and UPC.

[doris_vargas]

Up

[doris_vargas]

Hi! This discount coupon expired. I’m subscribe to cosmeticsandtoiletries.com and I received an email with a 40% off until January 29 to all allured books. 

[doris_vargas]

Okay! Thank You!

I hope you can do that seminar. I will still looking for information, just I started to work full time two weeks ago, so I have time until May.

[doris_vargas]

We actually use a Drum Rotator like this one:

https://www.youtube.com/watch?v=VEY4dGM8KVU 

Also we acquired recently a mixer that allow mix without open totally the drum. 

MMX 100 Universal Drum Mount (Closed Drum)

http://www.dynamixinc.com/mixers-by-model/mmx/universal/ 

I ask the supplier which type of mixer they use to blend the dispersed previously product, also type of blades, time and rpm of the mixer; but unfortunately they cannot provide me that information, they says is very proprietary to his business. 

Thank you for the suggestion!

[doris_vargas]

Thank you Bob for the link!

I’m doing that research. I found like 3 or 4 manufacture companies of compaction machine but not in lab scale. 

Also I have doubts about how is made commercially because I read that it is mix, mill, sieve and compacted, but not detailed information. So I have many questions for example:

What type of mixer is used in the industry of eyeshadow, a V type blender or double cone like the ones used in pharmaceutical industry? 

Some of the ingredients (preservatives, binder, emollient) is in liquid form? If yes, then the mixer should have nozzles integrated to spray the ingredient or just can be added without sprayed them?

When is the mill procedure, after or before added preservatives, binders or mica? 

How is made commercially with all the detailed information of the machinery is very important for my internship, because then I can search prices and do a economic analysis to know how much the company need to invest.

Once I finish that, if they see the manufacture viable, then I hope start doing some formulations, that is why also ask for lab equipment.

[doris_vargas]

I make a mistake in my past comment isn’t after is before.

If I take a sample after the mixing to measure viscosity I guess it will not be between the supplier range.

[doris_vargas]

Thank you all!

Bill_Toge: Yes, our nail polishes contain both stearalkonium bentonite and hectorite

Bobzchemist: I look up about thixotropic I thought that nail polish is a pseudoplastic. So it means nail polish is both thixotropic and pseudoplastics, its viscosity it will depends of the applied shear stress time (mixing time) and the increasing of shear stress (rpm of mixer)? 

The supplier says its viscosity range is 410-460 cps. The merchandise takes 10 days to arrive to our facilities. So obviously we need to mixing to re-suspend the pigments. I was thinking to do the following for my research: If I take a sample after the mixing to measure viscosity I guess it will not be between the supplier range. I can vary the time and rpm of mixing and take a measure viscosity before  mixing until I have the viscosity that our supplier provides. This maybe minimize the time of settling.

The company don’t have a viscometer so I need a good reason for them that spend approximately $4,000.00 it will be help to our problem.

I took engineering materials course so about the yield value I know is the stress that need to be applied to make a transition between elastic deformation to plastic deformation.