Print spec note:
Photo shop:
1. Image/mode/lab colour
2. Channel: Remove a, b channel
3. Channel: Remove alpha 2 channel
4. Image/mode/grayscale
5. Image/adjust/level.../
   adjust out put dark point from 0 to 70
   i.e. output level: 70 / 255

Nov 8, 2000 
Ed.