Photographers' Formulary Residual Hypo Test - 100ml Ebtech air-pressure-balanced case is provided to

air-pressure-balanced case is provided to keep your microphone safe during storage or travel

That means you can turn this vise in to a dolly

In addition to the traditional diaphragm

and easily lock the center ring into place

Photographers' Formulary Residual Hypo Test - 100ml Ebtech air-pressure-balanced case is provided toPhotographers' Formulary 03 0150 Overview Photographer's Formulary Residual Hypo Test is a simple chemical test that can be used to determine if a print or filmstrip has been adequately washed. The test is based upon the formation of a yellow stain of silver sulfide silver thiosulfate on the white of a test print (or the clear area of a negative film strip) when the test solution is applied.