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US 2010/0140915 A1Published application
Writing paper
OwnerOlof Hanssoninventor
Life of this patent
Estimating the term…
Abstract
The writing paper with lines has a paper area with one or many reading or writing lines wherein the paper has a main area with a first degree of color difference and one or many lines with a second degree of color difference, that visibly contrast the degree of color difference of the main area, characterized therein that the lines have a lower degree of color difference than the main area. The degree of color difference between the lines and the background area, defined as delta E in (CIE)-Lab space, is in the interval 1-18, preferably 2-10.
Claims5
A writing paper with reading or writing lines, comprising:
- a background area having a first color tone;
- a plurality of reading or writing lines being disposed at regular intervals in the background area, the reading or writing lines having a second color tone, the second color tone being lighter than the first color tone of the background area;
- the reading or writing lines having a width in a range of 0.1-1.5 millimeter, and
- the reading or writing lines and the background area having a color difference, defined as delta E (CIE)-Lab space, being in an interval of 2-10.
1 more element
Dependencies are inferred from the claim text.