How To Calculate Halftone Point Sizes Inwards Microns

When working amongst covert rulings, peculiarly those higher upward 200 LPI or FM screening, yous may withdraw to know the size of dots inwards microns. This is to brand certain that the plates, plate imaging system, press, as well as ink pigments are all capable of delivering the minimum printing dots through the process. For example, if the dot size is x microns exactly the ink paint size is 25 microns at that topographic point may non endure plenty dot surface expanse for the paint to stick to as well as hence that musical note volition endure dropped out on press. Or, if the covert calls for a x micron dot exactly the plate tin exclusively concur a twenty micron dot then, again, that musical note volition endure lost or bring to endure compensated for past times employing hybrid screening techniques.

Dot diameter inwards microns tin endure calculated using the next formula.
Where:
D = Dot expanse inwards per centum (e.g. 1% dot equals .01)
F = Screen frequency inwards lines per millimeter (LPM)

To convert the covert frequency from lines per inch utilization the next formula (2,540 dpi device on left as well as 2,400 dpi device on right):
While this formula is non absolutely exact, it gives a closed plenty approximation for most practical purposes.

Influenza A virus subtype H5N1 few things to cash inwards one's chips on inwards hear nearly halftone dot size. The formula applies to the size of dot that is generated past times the halftone screening algorithms inwards the RIP that volition endure sent to the imaging device. It does non calculate the size of the dot that appears inwards the concluding presswork which may bring been affected past times dot make or loss. Also, a RIP volition exclusively picture amount private pixels to degree a halftone dot. So, inwards the instance of a 2,540 dpi device, each pixel is x microns inwards size (10.6 microns for a 2,400 dpi device). Therefore, if, for example, the formula says that the concluding diameter of the dot is fifteen microns what volition hand is that the RIP volition alternate betwixt 1 pixel dots (10 micron) as well as two pixel dots (20 micron) which results inwards an effective fifteen micron dot average for that musical note value. You tin run into that happening past times watching the dot formation inwards the lighter tones at the get-go of the video located HERE.

Below is a quick reference comparing nautical chart showing the dot diameters for musical note values of 1% as well as 2% for diverse covert rulings from x LPI to 400 LPI on a 2,540 dpi platesetter.Highlighted areas are where the required dot is smaller than a unmarried pixel at the device's resolution as well as hence volition non endure imaged.