Home Cosmetic Science Talk Formulating Color Issue When Scaling Up

  • Color Issue When Scaling Up

    Posted by elden on June 26, 2024 at 11:07 pm

    First time poster here on this resourceful website.

    I’ve been working on a purple conditioner for the longest time. When I create small batches, the conditioner comes out a dark purple. When I try to scale up the conditioner it comes out purple but with a very slight hint of blue which is not present in the small batches. My hunch is that the scaled up batches aren’t properly mixing the color all the way. Any ideas why this slight variation occurs?

    mikethair replied 2 weeks, 6 days ago 4 Members · 3 Replies
  • 3 Replies
  • evchem2

    June 27, 2024 at 7:17 am

    Is your process the same from initial to scale up (ex same mixing blade types, scaled heating/cooling rates)? Are you using different raw material lots? Are you evaluating the initial vs scale up samples in the same kind of container, under the same kind of light?

    If you believe the mixing isn’t thorough enough, can you remix for longer time and see if color improves?

  • Perry44

    June 27, 2024 at 8:52 am

    Yep, it’s most likely a mixing issue. If you’re using purple you’re likely using a non-water soluble dye? If it is water soluble then you can first mix the colors in water and then add it to the main batch.

  • mikethair

    June 27, 2024 at 7:05 pm

    It’s always an issue of controlling all of the variables when scaling up. And this boils down to proper and extensive documentation for each batch. I always use prepared batch manufacturing records.

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