Calculators for the darkroom

Exposure time calculator using a stouffer step wedge

Exposure Time Calculator for Alternative Processes using a Stouffer Step Wedge

Constanza Isaza Martínez introduces the Lux Darkroom Exposure Time & Exposure Scale Calculator, a visual tool designed to simplify the often intimidating task of determining correct exposure times when working with alternative photographic processes. The calculator allows artists to identify maximum density directly on a digital step-wedge image and automatically calculates the optimal exposure time. Suitable for negative processes such as cyanotype, platinum and salt printing, positive processes like carbon … Read more

Photographic dilusions calculator

Calculator: Dilute a dilution – turn a 12% solution into a 3% solution

A calculator for diluting a solution to get the required strength – a calculator for photographic chemicals for the darkroom. For example the recipe you are using says you need a citric acid with 10% strength, but the one you have is a 50% concentrate. How do you dilute it to the strength you need? Use the Dilution calculator below to dilute calculate how to mix the solution to the … Read more

Photographic dilusions calculator

Calculator: Photographic chemical dilution – mix a 1/32 solution

If you have a photographic chemical solution you want to dilute to for example 1/32, where there is one part solution and 32 parts water, this calculator will help you work out how much solution to add and how much water to add? Use the Photographic chemical dilution calculator below. This Photographic chemical calculator requires you to have a solution that is 100% pure that needs diluting, if you have … Read more