I've put this up to offer a quick and easy way to resize one of your recipes
(Originally posted in the sticky thread "How to figure how much oil for mold" http://www.soapmakingforum.com/showthread.php?t=2909&page=22)
Using salt to get the volume of your mold (and avoid all volume maths!):
Pour salt into your desired mold, then pour the salt from the mold into a measuring jug. Read volume.
To resize your recipe to fit a new mold:
Pour salt into your existing mold, then measure the volume of the salt. Note the volume.
Pour salt into your new mold, then measure the volume of the salt from the new mold. Note the new mold volume.
Divide your new mold volume by your old mold volume. This is your Resizer Value.
Multiply your Resizer Value by the total oil weight of your original recipe.
The answer given is the total weight of oil you need for your new mold.
In one calculation this becomes New Volume / Old Volume * Original Weight = New Weight
1/ The Resizer Value will work just as well to calculate recipe weight (by multiplying the Resizer Value by your recipe weight, instead of oil weight)
2/ The Resizer Value will work using any weight measurement (eg. grams, kilos, pounds, ounces ...)
3/ You can substitute any pourable solid for the salt. So you can use salt, rice, split peas, sand ... whatever, so long as you can pour it.
(Originally posted in the sticky thread "How to figure how much oil for mold" http://www.soapmakingforum.com/showthread.php?t=2909&page=22)
Using salt to get the volume of your mold (and avoid all volume maths!):
Pour salt into your desired mold, then pour the salt from the mold into a measuring jug. Read volume.
To resize your recipe to fit a new mold:
Pour salt into your existing mold, then measure the volume of the salt. Note the volume.
Pour salt into your new mold, then measure the volume of the salt from the new mold. Note the new mold volume.
Divide your new mold volume by your old mold volume. This is your Resizer Value.
Multiply your Resizer Value by the total oil weight of your original recipe.
The answer given is the total weight of oil you need for your new mold.
In one calculation this becomes New Volume / Old Volume * Original Weight = New Weight
1/ The Resizer Value will work just as well to calculate recipe weight (by multiplying the Resizer Value by your recipe weight, instead of oil weight)
2/ The Resizer Value will work using any weight measurement (eg. grams, kilos, pounds, ounces ...)
3/ You can substitute any pourable solid for the salt. So you can use salt, rice, split peas, sand ... whatever, so long as you can pour it.
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