Kodak provides Kodak Professional Pro Strips, for monitoring Process RA-4 in professional labs and designed specifically for use with KODAK PROFESSIONAL Media (KODAK PROFESSIONAL PORTRA, SUPRA, and ULTRA Papers using KODAK EKTACOLOR RA Chemicals, Processes RA-4 and RA-4NP). The control strips detect process conditions that can degrade the quality of your finished prints and materials. They are better able to track the papers and materials that are processed in professional finishing laboratories.
These strips are available in boxes of ten moisture-resistant envelopes that contain five strips each. Each control strip, reference strip, and box label is marked with a code number. The code number identifies the strips as part of a particular batch. Each box contains correction factors for that particular code number. Use these correction factors to calculate the aim values for each batch of strips. Each strip measures 3 1?2 x 12 inches, and contains three neutral patches, a yellow patch, and an unexposed area. Control strips must be stored at 0F (-18C) prior to processing.