Friendly Friday: Between the Lines

This is my contribution to the Friendly Friday Photo Challenge: Between the Lines.

Between the Lines of tree trunks in the autumn.

Autumn tree trunks.

Between the Lines of my fingerprint in Sodium Thiosulfate crystals.

A fingerprint in sodium thiosulfate.

Between the Lines of bark on a tree trunk.

Monochrome tree bark.

Between the Lines of a Thirteen-lined Ground Squirrel.

Ground Squirrel in the summer.

Between the Lines of quartz in a boulder.

Monochrome boulder with lines of quartz.

Between the Lines of ice on Lake Huron at dusk in the spring.

Blue ice, orange water.

Lines of a fingerprint.

The Daily Post Weekly Photo Challenge is Lines.

The photo shows two overlapping fingerprints in sodium thiosulfate which has crystallized. The crystals were photographed through a microscope using polarized light.

Sodium thiosulfate is used as a photographic fixer in the darkroom as silver halide dissolves in it. Commonly known as Hypo in the days of the black and white darkroom.

A fingerprint in sodium thiosulfate.