trezor.io
Rate this file (Rating : 5 / 5 with 1 votes)
pencil drawing
trezor.io

Pencil Drawing

Koh-i-noor offers twenty grades from 10H to 8B for its 1500 series; Derwent produces twenty grades from 9H to 9B for its graphic pencils and Staedtler produces nineteen from 9H to 8B for its Mars Lumograph pencils.
The main market for such wide range of grades are artists who are interested in creating a full range of tones from light grey to black. Engineers prefer harder pencils which allow for a greater control in the shape of the lead. This is reflected in the way pencils are packaged and marketed. For example, for its Graphic pencils Derwent offers three packages of 12 pencils each: Technical (with hard grades from 9H to B), Sketching (with soft grades H to 9B), and Designer (with medium grades 4H to 6B).
Pencils graded using this system are used to measure the hardness and resistance of varnishes and paints. The resistance of a coating (also known as its pencil hardness) is determined as the grade of the hardest pencil that does not mark the coating when pressed firmly against it at a 45 degree angle.
Another common method uses numbers to designate the grade of a pencil. It was originally created by Conté and adopted in the United States by John Thoreau, father of Henry Thoreau, in the 19th century. The following table shows approximate equivalences between the different systems:

File information
Filename:595885.jpg
Album name:Art & Creativity
Rating (1 votes):55555
Keywords:#pencil #drawing
Filesize:74 KiB
Date added:Nov 22, 2013
Dimensions:700 x 496 pixels
Displayed:107 times
URL:displayimage.php?pid=595885
Favorites:Add to Favorites