Any maths enabled filmies out there? dev chem question

[AshleyC]

ok im just about to start doing some E6 development and notice that the chemicals for each step are made up from multiple liquids. What i want to do is have a spreadsheet where i can type in a final liquid amount, ie 270ml, and have 3 figures displayed in the correct ratios required to make it up.

for instance the first dev stage needs a mix made up of water, dev 1 and dev 2 in the ratio of 3:1:1 i think. So how much of each is needed to make up the required 270, or any other amount i might use since i can use a patterson tank which takes 590ml, a jobo rotator which uses the 270 or the paterson orbital which uses a lot less, i think i can get away with about 100ml in that.

So i want a forumla which will break down a figure into its ratio'd parts. The other stages have different ratios of chems but if i can work out the sums for one then i can work it out for all

Help me filmies, youre my only hope! You or google i guess.

 

[Andysnap]

I don't even understand the question.....

 

[dlh]

Each part is a fifth.

Water = 3/5ths
Dev 1 = 1/5th
Dev 2 = 1/5th

If I'm understanding you right.

 

[skysh4rk]

If I've read this correctly and you need three parts water, one part dev 1, and one part dev 2, isn't your formula to calculate the volume of each liquid just this: [(volume of tank)/5] x (number of parts)? So, for instance, your water for your Jobo would be (270/5)*3=162ml.

 

[robhooley167]

Easiest way is to just divide the final amount by the number of all parts added up, ie 270 / 3+1+1 = 54ml
So each part is 54ml then multiply that by the number of parts you need for each chemical.
Giving a make-up of 162ml + 54ml + 54ml for a total of 270ml.

Or for 100ml each part is 20ml giving a make-up of 20 + 20 + 60ml

 

[robhooley167]

Damnit, should really be more concise!

 

[AshleyC]

Awesome, that all makes sense. Thanks

 

[parhole4]

Well I'm glad someone understood it....lol

 

[chuckles]

Yep - 3:1:1