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If 98% of our ingredients are in grams/ kg packs, how to convert to ml on product tube
This is quite daunting and my thinking was that I ask the suppliers for each ingredients conversion to ml? As all ingredients would differ as we know it. Is there another way?
Thank you in advance.
Warm Regards
Chavonne -
10 Replies
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In what form is your finished product - solid/liquid/gel?
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In a lab setting, we would simply measure the specific gravity of the final product and adjust accordingly.
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Depends on the product. Can’t you measure the density of the finished product?
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You don’t need to make any conversions. As @Microformulation noted, simply make a batch of your product and measure the specific gravity. If you are trying to calculate what batch size in grams would be required to fill 100 - 15 ml tubes (or 1,500 mls) … then you can calculate the number of grams batch size you need. In my experience, most cosmetic products have a specific gravity not far off from 1.0
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If your product has a lot of water, for example it is emulsion or solution, then there is no difference in gram and ml.
100g of your product will be 100ml.
Even 1kg shampoo 1L.If it is waterless then it would be different.
I write gram weight in all my products.
People here think 100g lotion is more than 100ml lotion.
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I actually disagree @Abdullah. Usually surfactants (shampoos, etc..) need bigger volume to fill the amount. To fill 100ml would need a bit more than 100grams to fill the volume.
With emulsions (creams), it’s the opposite. To fill 50ml cream, you would need maybe 48grams of product.
This is often part of stability testing, when you measure PG before and after in the actual packaging.
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@Paprik i did measure these just once and concluded these results.
I weighted 1L shampoo with 10% surfactant and it was about 1kg.
I weighted 100ml lotion with ~10% oil phase and it was about 100g.
I weighted 100ml oil and it was less than 100g. -
Abdullah said:@Paprik i did measure these just once and concluded these results.
I weighted 1L shampoo with 10% surfactant and it was about 1kg.
I weighted 100ml lotion with ~10% oil phase and it was about 100g.
I weighted 100ml oil and it was less than 100g.The important thing you say is “about”.
When you scale up to hundreds kilos and you need to calculate the amount of product you need to make, this may become a big problem. As you may have not enough product or not enough packaging.Specific gravity is there for a reason.
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Paprik said:Abdullah said:@Paprik i did measure these just once and concluded these results.
I weighted 1L shampoo with 10% surfactant and it was about 1kg.
I weighted 100ml lotion with ~10% oil phase and it was about 100g.
I weighted 100ml oil and it was less than 100g.The important thing you say is “about”.
When you scale up to hundreds kilos and you need to calculate the amount of product you need to make, this may become a big problem. As you may have not enough product or not enough packaging.Specific gravity is there for a reason.
Agree
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