When Should I Replace My Applicator Bar? Reply

Drawdown of Paint. Photo Courtesy of BYK-Gardner.

Drawdown of Paint.
Photo Courtesy of BYK-Gardner.

There is no set time period to use in determining when to replace a bar. The way the bar is used and the materials that the bar is used with will determine the frequency of replacement. The specific requirements of the final drawdown are also key in determining the useful life of the bar. More…

Penopac Drawdown Charts Explained 5

Paint produced by the architectural paint industry must perform on a wide range of substrates. Some examples are previously coated wallboard, from glossy to flat, wood trim, plaster, uncoated wallboard, stucco, etc.  The porosity of these substrates varies greatly, yet the paint must maintain the same color and gloss appearance no matter the substrate.

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Opacity Drawdown Charts Explained 8

When we evaluate paint, we ask, “how much paint must be applied to hide the substrate below it?” or “does this paint hide better than that paint?”  Opacity is a paint’s ability to prevent the transmission of light in order to hide the substrate below it.  Throughout the paint industry, the terms hiding, opacity and contrast ratio have frequently been used interchangeably.  Hiding is a general term used to describe all of these concepts, including hiding power. However, hiding power also takes into account the spreading rate of paint and will not be discussed here. (More information on hiding power can be found in ASTM D 2805.) More…