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What does ink coverage results mean?

 

The "Results..." window shows ink coverage measurement results for the selected screen area or the PS file page. "Page total coverage density" - shows the total page coverage rate in percent. This value corresponds with the 5% ink coverage value usually specified in printer manuals. The result can be presented as the following: all the page is converted to the black-and-white format and ink is evenly distributed on the page; get the page evenly filled with gray color of the specified intensity (from 0% to 100%). "It is equivalent to (5% pages)" - displays the number of standard 5% pages to which your layout sheet is equivalent. That is, when "Page total coverage density" equals 10%, this means the printer will use the amount of ink/toner sufficient to print two pages with the standard 5% coverage density.

 

Besides these standard coverage values, APFill also calculates more specific and informative coverage characteristics. This, in turn, allows you to reduce ink/toner consumption.

 

"Common coverage": This is the percent of all pixels other than white in the selected area. Example: if the rate is 80%, this means that 80% of the page will be covered with ink and 20% will remain blank.

 

The "Copy to Clipboard" button copies the results (in a table form) to the clipboard, thus making it easy to import them to Excel. We recommend you create an Excel document in which there are formulas which allow you to estimate the cost of an imprint according to the coverage density result, paper size, paper sheet thickness, circulation, and so on. Thus, you can get the final cost of the imprint right after copying the results to Excel.

 

Coverage density results are presented in various color systems.

 

The following tabs are available:

 

"Common Coverage"

 

There are the following fields on this tab:

 

"Color coverage ratio" (all colored pixels ratio of the selected area).

"Color's coverage ratio" (each field shows the rate for pixels colored with the color of the specified intensity).

 

For example: if the common coverage rate is 49%, and intensity from 21% to 30% is 66%, this means that 49% of all pixels in the area are colored with some color, 66% of this 49% are the pixels with the intensity of 21%-30%.

 

"B/W coverage ratio" (shows the ratio of all pixels colored with gray in the selected area).

"Grayscale ratio" (each field shows the ratio of the pixels colored with gray color of the specified intensity).

 

For example: if the common coverage rate is 49%, and the 21%-30% intensity is 66%, this means that 49% of all pixels in area is colored with gray color, 66% of this 49% are the pixels with the color intensity of 21%-30%.

 

Color coverage ratio + B/W coverage ratio = common coverage ratio.

 

"RGB"

On this tab, you can see the measurement results for colored pixels in RGB. An average value for each of the R, G, B components is provided. On this tab, you can also see an average RGB color of the selected area. An average color is calculated on the basis of colored pixels only, i.e. white pixels are not calculated.

 

"CMYK"

On this tab, you can see the measurement results for colored pixels in CMYK. An average value for each C, M, Y, K component is provided. Thus, an average CMYK color is presented on this tab. An average color is calculated on the basis of colored pixels only, i.e. white pixels are not calculated.

 

"HSB"

On this tab, you can see measurement results for colored pixels in HSB. An average value for each H, S, B component is provided. Thus, an average HSB color is presented on this tab. An average color is calculated on the basis of colored pixels only, i.e. white pixels are not calculated.

 

"LAB"

On this tab, you can see the measurement results for colored pixels in LAB. An average value for each L, A, B component is provided. Thus, an average LAB color is presented on this tab. An average color is calculated on the basis of colored pixels only, i.e. white pixels are not calculated.

 

"Grayscale"

On this tab, you can see the measurement results for colored pixels in grayscale system. Every colored pixel is converted to gray and is counted. An average grayscale is calculated on the basis of colored pixels only, i.e. white pixels are not calculated. On this tab, you can also see an average gray color of the selected area. This tab can be useful for those who have black-and-white printers.

 

 

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