The following is taken from BSH glass printing requirements. One sentenc I am totally confusted. Hope you can offer your replies here!
All dots of the imprint must be in place.
10 % of the dots may have ± 25 % of the target print area.
5 % of the dots may have up to 50 % of the target print area,
accumulated on a maximum area of 50 x 50 mm.
What does the underlined mean here?:-)
This is a specification of the quality of the printing. Look closely at a black and white newspaper photograph (a 'half-tone') and you'll see thousands of little dots. If the picture meets a specified quality, the size of the dot - near enough, within the tolerance of the spec. - is the same as 'the target print area'. Lots of big dots trick the human eye into seeing that part of the picture as black.
Originally Posted by sky753
In your case, 85% of the dots must be at or very close to the target print area. 10% of them can be between 75% and 125% of the target area. And 5% of them can have between 50% and 150% of the target print area. (I'm guessing here, but I think there's a "±" missing). And this quality standard must be maintained throughout a square 50mm X 50mm (that is, a big picture doesn't meet the spec. if most of it is perfect but a square that small is substandard).
I don't know how this would translate to glass printing, but presumably the principles are the same.
10% of the dots may or may not cover 25% of the target print area.
whereas the 5% of the dots may cover the 50% of the target print area.
i am not a teacher
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