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Yes and no. The size of the exposure needs to remain the same, eg 10x8, but to save on paper, people usually just cut strips of the paper they are using and just test with those. You obviously don't get the whole image, but hopefully you can place the strip in such a way that it covers the tonal range of the image.
These are great! This is probably a dumb question but I'm planning on getting back to the darkroom soon and want to economise on paper...
When making a test print to determine exposure, is it necessary to make the test print the same size as the final print in order to get an accurate idea of how long to expose it for?
I.e. if planning to make a 10x8 print you'd make a 10x8 test print