LPI Chart

LPI Chart
Output/paper Typical Screen Frequency in LPI

Screen printing 35-65
Laser Printer/photocopier
Copier or matte laser paper 50-90

Laser printer/photocopier
Coated paper 75-110

Quick printer coated paper 60-85
Quick printer coated paper 75-110
Offset printing newsprint 60-85
Offset printing uncoated Appear 85-133
Offset Printing coated Paper 120-150+
High quality offset or gravure such as
Glossy color magazines 150-300



Scammomg Images

When we scan our image , it would be helpful if we could scan it to the size that we actually want on the final printed piece. This will avoid problems in interpreting the correct density and thus, the clarity, of our photograph. For example if we are designing an advertisement that is going to be used in uncoated news print paper and the photo we are scanning will double in size in our layout. We need to work on the scanning resolution he fore hand. Since that ad is going to be used in an uncoated news print paper, It will be output on an image setter at halftone line screen frequency of 133lpi. Since the size will double in the layout. The enlargement factor is 2. Therefore, scan resolution =2*133


We can scan images and import them using Photoshop application . It is possible through TWAIN cross platform interface, Once the components of the same are installed on .Outré Pc we can use Photoshop to import images captured by certain scanners, digital comers and frame grabbers.