Anilox BCM Ink Film Thickness and Consumption Calculator
The anilox roll sets how much ink the plate can pick up. This calculator converts engraved BCM into an expected wet and dry film and then into kilograms of ink for a job, so estimators and operators speak the same numbers.
Your numbers
Billion cubic microns per square inch, as engraved on the roll.
Share of cell volume that reaches the substrate. Roughly 30 to 60 percent is common, varies with ink, plate and substrate.
Dry fraction of the wet film by volume, from the ink data sheet.
Wet ink density from the data sheet.
Share of the web area covered by this ink station.
Your results
Transfer efficiency is an estimate that depends on plate, ink rheology, speed and substrate. Use press trials to calibrate it for your process.
Ink film vs anilox volume
Sweeps Anilox volume from 1 to 12, holding your other inputs fixed.
Ink usage versus standard
Optional review of how to compare actual ink issues in your ERP against planned consumption.
Optional. The tool and every export work without this. No spam.
How to use it
Enter the BCM stamped on the anilox roll and a transfer efficiency based on past trials. Add the ink volume solids and density from the technical data sheet. Then enter run length, web width, average coverage for that station and a loss allowance. The calculator returns wet film, dry film, grams per square metre, total kilograms and cost. Repeat for each colour station because anilox volume and coverage differ per unit.
The method
One BCM equals 10 to the 9 cubic microns per square inch. Divide by the area of a square inch in square microns (about 6.45 x 10 to the 8) and you get about 1.55 microns of theoretical depth. Multiplying by transfer efficiency gives the wet film on the substrate. Dry film is wet film times volume solids. Grams per square metre equals wet microns times density because one micron over one square metre is one cubic centimetre.
- Wet film (um) = BCM x 1.55 x transfer
- Dry film (um) = wet film x volume solids
- Laydown (g/m2) = wet film x density
- Ink kg = laydown x area x coverage x (1 + loss)
Common mistakes
Using weight solids instead of volume solids overstates dry film. Assuming a fixed transfer percentage across very different substrates also creates errors, since film, paper and board take ink differently. Line screen and cell shape change both the pickup and the release, so the same BCM can behave differently. Treat the answer as a planning number and lock in your own constants after a few jobs.
- Use volume solids from the data sheet
- Record real consumption after each job to refine transfer
- Do not forget wash-up and press-side ink in loss
- Check the roll for wear that lowers true volume
Frequently Asked Questions
What does BCM mean?
BCM is billion cubic microns per square inch. It describes how much volume the engraved cells of an anilox roll hold per unit area, which sets the maximum ink the roll can carry to the plate.
What transfer efficiency should I use?
Many printers start near 40 to 50 percent and adjust with trials. It varies with plate, ink, speed and substrate. Use your own measured consumption to tune it.
Does coverage mean percent dot area?
Use the share of the web area that this ink station actually prints, averaged over the job. Solids count as 100 percent and screens count at their dot area.
Is dry film what the customer measures?
Dry film is the thickness left after solvent or water evaporates or UV cures. Densitometer readings relate to it, but optical density also depends on pigment loading and substrate.
We can help you pull actual ink issues from your ERP job costing and compare them to these planning numbers.
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