to clothe oneself in: to draw on one's gloves.draw off, to move back or away: He drew off the enemy.to make a sketch or drawing of: to draw in a human figure.to cause to take part: This is your fight don't draw me in.draw away, to move farther ahead: One runner drew away from the pack.to take out a weapon for action: He drew his gun quickly and fired.slowly or continuously: The day draws near. to steep (tea) in boiling water: She drew a nice pot of tea for us.Games to take or be given (a playing card) from the pack: I drew two sevens. Sport, Gamesto finish (a contest) with neither side winning.Nautical, Naval Terms (of a vessel) to need (a specific depth of water) to float: The boat draws six feet.to hold a lottery or the like: to draw for prizes.to pick at random, as from among marked slips of paper or numbered tickets: to draw straws to see who wins.to choose by or as if by lottery: He was unlucky enough to draw kitchen cleanup twice in one week.Sportto bend (a bow) by pulling back the string to shoot an arrow: The archers drew their bows all at once.I drew in a deep breath to calm down.īring in: The deposits draw interest. Take (a breath) in: to draw liquid through a straw. I really can't draw.įigure out: to draw a distinction. to compose or create (something) in words or pictures ĭepict: to draw a lifelike portrait.to bring, take, or pull out, such as from a source: to draw water from a well.Īttract: The sale drew large crowds.The train drew off before I could signal the conductor. He drew the car in to the side and stopped. to (cause to) move in a particular direction by or as if by pulling ĭrag: The horses drew the cart along.Using an Automatic Drawdown Machine is the best choice to achieve consistent results, as film thickness can vary in a manual drawdown based on the speed and pressure applied by the operator.įinally, be sure to select a one piece 440 grade stainless steel bar, as they are the easiest to clean and maintain, and will last the longest time.Draw /drɔ/ USA pronunciation v., drew /dru/ USA pronunciation drawn, draw Also be sure to use a flat, consistent surface under your substrate, such as a Glass Drawdown Plate or vacuum plate. Try to use a standard width drawdown bar if possible, as these are readily available from stock and are your least expensive option. The most common substrates are BYK Drawdown Charts, which are available in multiple sizes, but almost any uniform, flat substrate can be used. Once you have determined the optimal film thickness that you would like to use, determine the bar width that you need, depending on the width of the substrate that you will use for the drawdown. So if you have a gap clearance of 6 mils, the theoretical wet film thickness will be approximately 3 mils. As a rule of thumb, the Theoretical Wet Film Thickness of a bar is roughly 50% less than the gap clearance listed for the bar. ASTM D823 contains more information on this subject. Variables such as gap clearance, coating viscosity, percent solids, solvents used, drawdown speed, surface energy and substrate absorptiveness all influence wet film and dry film thickness. Actual wet film thickness can be 40% to 90% less than the gap, and dry film thickness can vary even more. There are many variables in the drawdown process. It is important to remember that the wet film thickness and dry film thickness of your drawdown will be less than the gap clearance of your applicator. A good tool for this is the Gardco Microm Film Applicator an adjustable thickness applicator that can be used to create varying film thicknesses with very high precision. This can be accomplished by experimenting with various film thicknesses until you determine which film thickness yields the optimal desired product performance. The first step in determining which drawdown bar to use is to determine the optimal film thickness for your application. One of the reasons that high quality and precision Drawdown Bars, (also known as Bird Type Applicators and Doctor Blades) are used in making drawdowns is to ensure that a consistent film thickness is achieved, since most coating properties are thickness dependent. Color, gloss, opacity, pigment dispersion, wettability, dry weight, drying time, scrub resistance, pigment and dye uniformity, clarity, adhesion, and a host of other properties are measured on the completed drawdowns.
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