ImagOn HD has a light transparent green emulsion and is a slower film than ImagOn ULTRA rapid.
Both factors which contributes to making it a sharper film for imaging purposes.
ImagOnHD requires about twice the exposure as ImagOnULTRA rapid.
To lighten an image INCREASE exposure and to darken DECREASE exposure.
For best results laminate film at least one day in advance of exposure.
Instructions available here.The initial tests for the ImagOnHD film have shown it to be vastly superior for heat exposure than previous films. A roll of ImagOnHD was left in direct sunlight for 18 hours (with and with out the Cool Shield Bubble Wrap) The inside temperature of the unprotected tube reached 98°F without melting or discoloring the film. The Cool Shield Bubble Wrap decreased the temperature by about 15°F.... This exposure to heat could never have been done with previous films without noticeable heat damage and is therefore shaping up to be the greatest improvement to ImagOn EVER! This, I believe, is an unintended characteristic of this new film, which was developed mainly to increase image definition, thus the HD (high definition) labeling reflected in its name.
ImagOn HD is a sharper film for imaging purposes with a light transparent green emulsion that is a slower film than ImagOn ULTRA rapid.