Making a standard working solution

Questions on using pyro (pyrogallic acid) for film processing.

Moderator: Black & White Moderators

Post Reply
Colorado4x4
Posts: 1
Joined: Mon Sep 28, 2020 5:11 pm
Location: Colorado

Making a standard working solution

Post by Colorado4x4 »

Reading about Pyro, I am confused when directions are given to make a "standard working solution". When I read "To make a standard working solution mix 1 part A with 1 part B with 100 parts water", does that mean, & this is an example: 1ml part A, 1 ml part B, 100 ml water? So to make a working solution of 1000ml what would be the amounts needed for part A & part B & water?
Thanks for you input. :oops:
There is no "X" in Espresso
User avatar
payral
Posts: 5
Joined: Mon Aug 22, 2016 9:31 am

Re: Making a standard working solution

Post by payral »

Are you really asking that question ? By how much do you multiply 100 ml to have 1000 ml ? So you multiply A & B by the same amount.
Philippe Ayral
www.payral.fr
User avatar
JB Harlin
Posts: 41
Joined: Sun Jan 31, 2016 7:22 pm

Re: Making a standard working solution

Post by JB Harlin »

The simplest way to do this is to add a zero to each solution. Thus, 1:1:100 would become 10:10:1,000. This is the easy way, and yes you will come up with 1,020ml. . . this is plenty close enough. What is more important is to make sure you always mix exactly the same. Write it down; refer to your notes every time you mix chemistry. Consistency is absolutely the most important thing to keep in mind. Just to be clear; if you need a 2:2:100 mix, add a zero and you get 20:20:1,000. It is simply a ratio of the two parts of stock chemistry to water. Hope this helps.
Post Reply