Tetenal C-41 kit: check my logic

[FujiLove]

Here are the instructions for the Tetenal C-41 kit, which is based on a 1 litre solution. As I only mix up 500ml, I've been using the times shown for 1-4 films for my first two, the 5-8 film time for my third and fourth etc. The logic being that the chemicals will get used up at twice the speed, there being only half the volume. Does that sound reasonable, or is that not the way these chemicals react?

The other question is: what's the column marked '1-16 Films' for (in the same column as the '5-8 Films')?

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[Kevin Allan]

the 1-16 column refers to the pre-heat time, rinse time, and stabiliser time which remains the same no matter how many films you have processed

With 500ml you will be able develop 4 films with the first set of times, then another 4 with the times from tne next column, then the chemicals will be used up and you have to mix some more.

 

[FujiLove]

the 1-16 column refers to the pre-heat time, rinse time, and stabiliser time which remains the same no matter how many films you have processed

With 500ml you will be able develop 4 films with the first set of times, then another 4 with the times from tne next column, then the chemicals will be used up and you have to mix some more.

So are you saying that my smaller volume of chemical isn't degrading faster than the larger volume would? Hmmm...my mind says, if it's completely worn out after 8 films, then it must be half worn out after 4 films and therefore I should be using the 9-12 film timings for my 5th + 6th films.

I'm still confused!

 

[Asha]

I pretty much go with what Kevin says tbh as the whole 1000ml is designed to yield approx 12 - 16 films according to the manufacturer

That said, I've used a few of these kits and done half mixes (ie 500ml) as well as 1000ml

Even with the smaller mix i still obtained about a dozen films out of it , thus about 24 films in total out of the kit!!

More recently i've been quite slack with temperature control and yes there has been a tiny bit of colour adjustment needed in pp but no more than when i was glued to the thermometer fearing a shift of a degree and a half.

Misx it, dev it and watch how the results come out ...you'll know instinctively when the chems are becoming exhausted and besides you can always clip test if you're concerned of stuffing a complete roll.