The correction doesn't go into the QTR profile curve. It is applied directly to the positive image in Photoshop before printing. Any value of 255 in the positive image will print as clear in the reversed QTR profile because that value is reserved for gloss optimizer and will always be clear in the transparency.
Don't know why 254 didn't work for you. It does for me. The use of 255 for the gloss optimizer was relayed to me by Roy Harrington.
Alan
On Jan 5, 2015, at 11:16 AM, ctb@zeelandnet.nl [QuadtoneRIP] wrote:
Hi Alan,
I did some more testing this afternoon. For me cutting down the highlights from 255 to 254 did not work. But when setting the curve display mode to 'pigment inks' instead of 'light' with a 1% cut down it works ok. Translated in photoshop values this is a cut down from 255 to 252.
When I try to insert this 1% correctio into the curve applied to the QTR profile it does not work. Have to look into that some more tomorrow.
best,
Kees