WORK IN PROGRESS, Yosemite print
The 4th etch is a 1 to 3 minute creep-etch. Now the plate has been etched 3 to 8 minutes.
The 5th etch is another 1 to 3 minute Creep-etch. Most of the plate has been etched 4 minutes, while the top has been etched up to 11 minutes.
The 6th etch is a 2 to 4 minute Creep-etch, for a total of 6 to 15 minutes.
The 7th etch is for 2 minutes, for a total of 8 to 17 minutes.
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