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These precision molded darkroom developing trays are made of
high impact polystyrene which translated, means these trays are almost
unbreakable and indestructible. The SPI brand of darkroom trays are
also resistant to all currently known darkroom chemicals. Interior
grooves molded into the tray bottoms make it easy to lift up wet and
developing papers from the bottom of the tray without scratching
or causing other damage with the tongs. Three of the corners are grooved
to hold a thermometer in place; the fourth corner is molded with a
pronounced pouring spout for easy emptying.
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