Re: measuring density
Re: measuring density
- Subject: Re: measuring density
- From: "Markus Daetwyler" <email@hidden>
- Date: Fri, 11 May 2001 14:17:02 +0200
Hi,
>
When measuring density, the usual result is a number (for example 1.4).
>
Does this measurement result have a label?
No, it does not. Densty is defined as the logarithm of the quotient of the intensity of the light reflected by plane paper and the light reflected from the coloured paper. It is like saying 14 cm ist 1.4 times 10 cm. Here the "1.4" also has no label.
>
If I measure with my tools and get a "status T" density is this different from other types of
>
density values?
To measure densities of colours you need filters. There are several standards for these filters one of which is called "Status T"
>
How about the scale - is it a linear scale or a log scale?
It is a logarithmic scale concerning the light intensity but it is said to be proportional to the thikness of the ink layer.
>
Thanks, Greg
I hope that it is a little bit more clear now.
Markus Ddtwyler
ugra c/o EMPA St. Gallen, Switzerland