Photographers' Formulary Residual Hypo Test 100ml Dinkum Systems Matrox Monarch HD ensures that Easy to read screen Matrox Monarch HD ensures that the Content Delivery Networks (CDNs) are focused on delivering quality video to your audience while you control the quality of the archive Separate tension and pan lock controls with rubber knobs 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 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