Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Lab batch viscosity versus big scale production viscosity

Lab batch viscosity versus big scale production viscosity

Lab batch viscosity versus big scale production viscosity

Can someone help me understand or confirm if a lab batch with 2kg batch size will really produce 50% reduction on viscosity during the actual production?

We are trying to make a body butter and a facial scrub-- emulsion products, unfortunately we couldn't re-produce the desired viscosity in the lab batch. Is this normal? I know there is really variance, but 50% reduction in viscosity is way too depressing.. and for us is not reasonable.

Can anyone give us other information what else to account for this investigation.

We are using Homogenizer, mixer, scraper and recycling of the bulk during the compounding of the actual batch. In the lab batch, only recycling was not applied due to Lab limitation.
In this case will it really provide that big difference in viscosity?
How will I know the degree of shear stress produced on those equipment mentioned above?

Hope someone will hear me...


RE: Lab batch viscosity versus big scale production viscosity

Viscosity of an emulsion can be extremely sensitive at high solids loading!  Can you give us an idea of your total solids, particle shape, particle size, and particle size distribution?

Good luck,

RE: Lab batch viscosity versus big scale production viscosity

Also you will want to make sure that the mixing in your lab batch is the same as you production mixers -- eg energy input paddle and vessel design etc. -- scale up is always a bixx

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


White Paper: Industrial Control Basics: Contactors
A contactor is an electrical device used for switching an electrical circuit on or off. Considered to be a special type of relay, contactors are used in applications with higher current carrying capacity, while relays are used for lower current applications. Download Now
Research Report: State of IoT Adoption in Product Development 2019
This research report, based on a survey of 234 product development professionals, examines the current state of Internet of Things (IoT) adoption by product design teams, its perceived importance, and what features and capabilities teams consider important when making decision about adding IoT functionality to their products. Download Now
Research Report: Augmented Reality for Maintenance, Repair and Overhaul (MRO)
The term Industry 4.0 denotes a cluster of technologies that’s poised to fundamentally reshape manufacturing and bring about a new industrial revolution. These include 3D printing (AM), the Industrial Internet of Things (IIoT), artificial intelligence (AI) and mixed reality technologies, more commonly known as virtual reality (VR) and augmented reality (AR). Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close