35 mm TRANSPARENT: cut to fit standard plastic slide mounts
Like all transparent HCTs, the 35mm HCT is exposed on 8 x 10 inch film and cut to fit standard plastic 35 mm slide mounts. Film width is the same as 35mm film but there are no sprocket holes. Due to the small patch size, 35mm HCTs cannot be individually-measured cost-effectively. Instead, two 6 x 7 cm HCTs from each 8 x 10 sheet are averaged to get one reference file. 35mm HCTs are therefore "small-batch-measured", not individually-measured, but tests indicate the quality is just as good.

5x7 REFLECTION: Each 5 x 7 inch reflective HCT is individually-measured and comes with a unique serial number and reference file. Although primarily intended for scanners, the reflective HCT also works well in profiling digital copy-cameras. The reflective HCT is especially effective for fine-art reproduction because its extended shadow gamut and glossy finish simulate the character of varnished oil paintings more closely than other targets. The glossy surface can be a challenge, however, and great care is needed during the profiling capture to avoid surface reflections.

Reflective HCTs are made on Fuji Crystal Archive paper for wider color gamut and longer life. Kodak reflection HCTs are printed on new Ultra Endura paper. Kodak claims this new paper has better longevity than Fuji Crystal Archive, and manufacturer Don Hutcheson says, "Initial tests indicate that Ultra Endura paper produces slightly better saturation than Fuji Crystal Archive. If the longevity claims are true and the increased saturation is a consistent effect, then I would recommend buying the Kodak reflective target instead of the Fuji one, if only one is purchased."

6x7 - SPECIAL ORDER - Each 6 x 7 cm HCT is individually-measured. A metallic serial number sticker identifies the reference file and serves as an 'infinite density ' patch for Extended-Range Profiles. Like all transparent HCTs, the 6 x 7 HCT is exposed on 8 x 10 inch film and cut to 120/220 film width.

Although primarily intended for medium-format scanners such as the Nikon 8000, Polaroid SprintScan 120 or Minolta DiMAGE Scan Multi PRO, 6 x 7 cm HCTs can also be used on drum scanners with virtually the same quality as the 4 x 5, however being smaller, the 6 x 7 is harder to compare visually to an enlarged proof when testing the profile.

CHROMiX does not typically stock the 6x7 size as it is custom made from HutchColor at time of order, so there may be a slight delay before it ships.