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Production result different
Hi all,
I would like to ask an opinion/possibilities issues on lotion production. Since I quite new in this field, I just want to know if is it normal if we use same formulation, method and processing but turn out the viscosity got different. Can it because of the different batch of the raw materials use? can you guys share your experience? thank you in advance.
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8 Replies
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Yes, always encounter.
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oh i see, if you dont mind, may i know what is your corrective action to overcome this kind of problems?
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Hi! Lots of possible explanations for seeing different viscosity. The formulation itself (kinds of ingredients used, type of emulsion)- are your raw materials from the exact same lot as previous batches or different? Did you scale up at all? Did you cool at a different rate?
Then there’s the measurement method itself-how are you measuring viscosity (the equipment type and the temperature, time, spindle geometry)? How different is the viscosity from your previous batches? For example a few hundred cPs is likely not cause for concern, but several thousand? might want to monitor and assess if your product looks/performs any differently than expected. If this is a new formulation its common to keep a broader viscosity range specification until you have made several production batches (say 10 +) to get an idea of your normal batch to batch variation (and what is not normal)
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different range in viscosity around 15k, last month we made 16 batches, the results quite consistent for the viscosity. fyi, we standardized the temperature and viscosity spindle. for this month, we open new batch emulsifier, then we noticed the viscosity quite low from last month. we are using natural emulsifier, so not sure if this really affect the visco.
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You use different mixing equipment, you shouldn’t be surprised if you get different viscosity.
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ohh i see, So, what do you think everytime we open the batch raw material, there are some issue with the viscosity? do we really need to broaden our viscosity range or do we need to adjust our formulation everytime to fit the viscosity?
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Lots of things can impact viscosity including…different mixing conditions, different raw materials, different amounts of ingredients used, etc.
Ideally, you should not be making many adjustments so set the specification such that you minimize adjustments. However, you also don’t want to sell products with wildly different viscosity levels. While a consumer can’t usually tell the difference between 4000 and 6000 cps, they can tell a difference between 4000 and 25,000 cps. You want to set the specification such that it is wide enough that you don’t need to make batch adjustments, but narrow enough that consumers can’t tell a difference.
Only through multiple batch making will you be able to determine what the best range should be.
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I got it. Thanks a lot for helping
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