# Need math help

**URL:** <https://pheromonetalk.com/t/need-math-help/51458>\
**Category:** Men's Pheromone Advice & Field Reports\
**Created:** [July 26, 2011, 8:46pm UTC](https://pheromonetalk.com/t/need-math-help/51458 "2011-07-26T20:46:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![paradox1](https://sea2.discourse-cdn.com/flex016/user_avatar/pheromonetalk.com/paradox1/32/1196_2.png) [@paradox1](https://pheromonetalk.com/u/paradox1)\
**Post date:** [July 26, 2011, 8:46pm UTC](https://pheromonetalk.com/t/need-math-help/51458/1 "2011-07-26T20:46:00Z")

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I purchased a putative that is a 12.5 mcg/spray. I need to dilute it to give me 2.5 mcg/spray. The second part of this is that I don’t have any PA. Would regular cologne be a good substitute? I think that the dilution is 4 parts putative to 1 part PA. Correct?

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**Author:** ![Vespero](https://sea2.discourse-cdn.com/flex016/user_avatar/pheromonetalk.com/vespero/32/988_2.png) [@Vespero](https://pheromonetalk.com/u/Vespero)\
**Post date:** [July 26, 2011, 11:06pm UTC](https://pheromonetalk.com/t/need-math-help/51458/2 "2011-07-26T23:06:23Z")

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Close, but you have it backwards. You want 1 part putative to 4 parts of whatever you’re putting it in. Thus, the 12.5mcg of putative in each original spray is now distributed evenly among 5 parts solvent, giving 12.5/5 = 2.5mcg/spray. However, it would be best to mix the solution in a bottle identical to the one the putative is in. So, if it’s a 5mL to-go bottle, combine your putative and cologne in a to-go bottle as well. This is because the concentration per spray is calibrated to the spray size of the bottle it’s in. Another kind of bottle might have a different spray size, and that would throw everything off.

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**Author:** ![paradox1](https://sea2.discourse-cdn.com/flex016/user_avatar/pheromonetalk.com/paradox1/32/1196_2.png) [@paradox1](https://pheromonetalk.com/u/paradox1)\
**Post date:** [July 26, 2011, 11:54pm UTC](https://pheromonetalk.com/t/need-math-help/51458/3 "2011-07-26T23:54:52Z")

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> [@Vespero](#):
>
> Close, but you have it backwards. You want 1 part putative to 4 parts of whatever you’re putting it in. Thus, the 12.5mcg of putative in each original spray is now distributed evenly among 5 parts solvent, giving 12.5/5 = 2.5mcg/spray. However, it would be best to mix the solution in a bottle identical to the one the putative is in. So, if it’s a 5mL to-go bottle, combine your putative and cologne in a to-go bottle as well. This is because the concentration per spray is calibrated to the spray size of the bottle it’s in. Another kind of bottle might have a different spray size, and that would throw everything off.

Yes, Vespero I did type it backwards. Thank you so much for the confirmation of the math. My plan was to use a to go bottle to get the right spray amount. Thanks again Vespero!