
the yield value (commonly called 'yield point') is the resistance to initial flow, or represents the stress required to start fluid movement. This resistance is due to electrical charges located on or near the surfaces of the particles. The values of the yield point and thixotropy, respectively, are measurements of the same fluid properties under dynamic and static states. The Bingham yield value, reported in lb/100 square feet, is determined by the direct-indicating viscometer by subtracting the plastic viscosity from the 300-rpm reading. ...
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Stress in an adhesive joint at which a marked increase in deformation occurs without an increase in load.
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http://www.instron.co.uk/wa/resourcecenter/glossary.xhtml

The actual amount of force needed to start an ink flowing.
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(Yield Strength) The lowest stress at which a material undergoes plastic deformation. Below this stress, the material is elastic; above it, viscous.
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https://www.teampti.com/glossary-of-terms/
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