Pens and Inks, Continued Drawing over pencil lines in ink You may draw in ink over lines previously drawn in pencil. The pencil sketch may be drawn directly on the paper surface or on tracing paper and transferred to the paper surface.    After the inked in portion of the drawing is complete, remove the graphite underdrawing with a soft eraser.    If the basic pencil drawing contains too much graphite, the ink will crawl, or roll away from the pencil line.    Should this occur, carefully remove some of the graphite with a soft eraser. Ink washes Drawings made in diluted ink with a brush are called washes.    Washes  are continuous-tone  renderings.  Washes  are  difficult  to  control  because  of  the amount of water in the medium and have very little latitude for correction. Ink washes require preparation and planning. Preparing  for Before putting the brush to paper, you must do a basic drawing, prepare the ink washes paper surface, and mix the value range of your washes. Preparing a paper  surface Washes are painted on watercolor paper.    The weight of the paper determines whether or not you need to fix the paper to a solid surface before painting. This procedure is called stretching the paper.    Thin paper that is not stretched will curl and buckle during the painting process. Thick paper, rated at 300 lbs or more, does not require stretching. Stretching the Paper To prepare watercolor paper, follow this table: Step Action 1 Select a paper and allow it to soak fully submerged in lukewarm water  for  approximately  20  minutes. 2 Remove the paper from the water and place it on a solid board. 3 Using craft-paper tape, tape all around the edges of the paper. 4 The paper is ready for use when the sheen of the water disappears from  the  paper  surface.   You can also wait until the paper is completely  dry. Continued  on  next  page 1-38