Zz

Z
(1) one of the three CIE tristimulus values, the blue printer; (2) spectral color matching function of the CIE Standard Observer used for calculating the z stimulus value: (3) one of the CIE chromaticity coordinates; (4) symbol for atomic number; (5) electrics — impedance.

z
abbreviation for zero

Zahn cup
an efflux device for measuring the viscosity of an ink. (Viscosity expressed in the number of seconds it takes to empty a cup through a an orifice of deifinite diameter).

z-axis
(1) one of three axes in a three point coordinate system for locating points in space; (2) theoretical line providing a depth reference point; (3) direction perpendicular to fibers in a woven fiber reinforced laminate.

zB
abbreviation for German term zum Beispiel meaning example.

ZFS
acroynm for zinc formaldehyde sulfoxylate.

zero discharge
discharge from a point source that has been determined to contain minimal or no polutants. (A goal set by the U.S. Federal Water Pollution Act of 1972 for attaining total recycling within closed industrial systems by 1985).

zero offset
the difference expressed in degrees between true zero and an indication given by a measuring instrument.

zero suppression
the span of an indicator or chart recorder may be offset from zero (zero suppressed) such that neither limit of the span will be zero. (For example, a temperature recorder that records a 100 degree span from 400 degrees to 500 degrees is said to have 400 degrees zero suppression).

ZIF
acroynm for zero insertion force.

zig-zag
a stitch that progresses in an alternating angle used for final stitching of apparel.

zig-zag fold
refer to fan fold.

zinc formaldehyde sulfoxylate
the chemical that removes the color from a dischargable substrate.

zinc oxide
an opaque inorganic white pigment used in printing ink.

zinc yellow
a yellow pigment consisting of zinc chromate.

zip
to compress a digital file, used to reduce the size of a file to speed up transmission time over the internet.

Zip-A-Tone®
trade name for series of screen patterns imprinted on plastic sheets that are used to create tones of various types on artwork.

zip drive
a removable device employing a small disk similar in design to a floppy disk, allows for more storage space and speed.

zomag
special lightweight magnesium alloy used for relief etching.

zoom
making an image or image part become larger than it appears on the original.

zoom-in
to make an image larger.

zoom-out

to make an image smaller.